AEC Free Software directory

Introduction

This page lists software published under a Free/libre or Open Source (FLOSS) software license. It lists many types of packages for many purposes and is surely not comprehensive as the reach of FLOSS is extensive and always growing. If you know of anything we're missing please let us know by just adding it wherever you think it makes sense.

General Purpose

If you're not familiar with Free & Open Source software useful for general use you can read our page on Open source software beginners

Schematic design

Schematic design is defined as loose sketching, idea development, prototyping, and feasibility studies, without delving into the detailed geometrical or data attributes of a design.

Logo	Name	Description	License
	Blender	Blender is the free and open source 3D creation suite. It supports the entirety of the 3D pipeline—modeling, rigging, animation, simulation, rendering, compositing and motion tracking, video editing and 2D animation pipeline.	GPL-2.0
	First Draft	A real time, web-based whiteboarding and markup tool. Code: https://gitlab.com/MeldCE/first-draft	GPL-3.0
	FreeCAD	FreeCAD is an open-source parametric 3D modeler made primarily to design real-life objects of any size. Parametric modeling allows you to easily modify your design by going back into your model history and changing its parameters	LGPL-2.0
	Krita	Krita is a professional free and open source painting program. It is made by artists that want to see affordable art tools for everyone. It specialises in concept art, texture and matte painters, illustrations and comics.	GPL-3.0
	Sweet Home 3d	Sweet Home 3D is a free interior design application that helps you draw the plan of your house, arrange furniture on it and visit the results in 3D.	GPL-2.0

GIS

Geographic Information Systems are used to interrogate GIS-level data, overlay multiple data sets, and integrate with BIM data.

Icon	Name	Description	License
	BlenderGIS	Blender add-on. Make the bridge between Blender and geographic data	GPL-3.0
File:Grassgis logo colorlogo text whitebg 64.png	GRASS GIS	Geographic Resources Analysis Support System (GRASS) from the U.S. Army Corps of Engineers' Construction Engineering Research Laboratory (USA/CERL)	GPL-2.0
	JOSM	JOSM is an extensible editor for ​OpenStreetMap (OSM) for ​Java 8+. It supports loading GPX tracks, background imagery, and OSM data from local sources as well as from online sources and allows to edit the OSM data (nodes, ways, and relations) and their metadata tags.	GPL-2.0
	mago3D	mago3D seamlessly integrates AEC (Architecture, Engineering, Construction) and 3D GIS in web browser using Cesium.	Apache-2.0
	Open Orienteering	OpenOrienteering is a project developing a collection of tools which help with the creation of orienteering maps and the organization of orienteering events.	GPL-3.0
	OpenStreetMap	OpenStreetMaps is a community built map of the world, powering map data about roads, trails, cafés, railway stations, and much more, on thousands of web sites, mobile apps, and hardware devices.	ODbL
	QGIS	A Free and Open Source Geographic Information System to create, edit, visualise, analyse and publish geospatial information.	GPL-2.0
	QField	An android app that syncs your QGIS projects to a mobile device and allows for in the field GIS data viewing and entry.	GPL-2.0
	SAGA	GIS System for Automated Geoscientific Analyses designed for the easy and effective implementation of spatial algorithms.	GPL

Visualisation and Documentation

Open source tools useful for all graphical work involved in the process of architecture design. 3D render generation, image manipulation, page layout, etc. For a list of relevant pages including documentation and tutorials see Category:Visualization and Documentation.

Icon	Name	Description	License
	Appleseed	appleseed is an open source, physically-based global illumination rendering engine primarily designed for animation and visual effects. It provides individuals and small studios with a complete, reliable, fully open rendering package built with modern technologies.	MIT
	Blender	Blender is the free and open source 3D creation suite. It supports the entirety of the 3D pipeline—modeling, rigging, animation, simulation, rendering, compositing and motion tracking, video editing and 2D animation pipeline.	GPL-2.0
	Blender2Godot	Blender add-on. A free tool developed for quickly testing and deploying virtual / interactive visualizations, by linking Blender to the Godot Engine. Blender2Godot is a Blender3D addon that exports a Blender 3D scene to a Godot Engine project. This addon is in alpha state and thus still has a lot of bugs.	GPL
	GIMP	GIMP is a cross-platform image editor available for GNU/Linux, OS X, Windows and more operating systems. GIMP provides the tools needed for high quality image manipulation. From retouching to restoring to creative composites, the only limit is your imagination.	GPL-3.0
	Hugin	An easy to use cross-platform panoramic imaging toolchain based on Panorama Tools. With Hugin you can assemble a mosaic of photographs into a complete immersive panorama, stitch any series of overlapping pictures and much more.	GPL-2.0
	Inkscape	Inkscape is a professional vector graphics editor for Linux, Windows and macOS. Whether you are an illustrator, designer, web designer or just someone who needs to create some vector imagery, Inkscape is for you!	GPL-2.0
	Krita	Krita is a professional free and open source painting program. It is made by artists that want to see affordable art tools for everyone. It specialises in concept art, texture and matte painters, illustrations and comics.	GPL-3.0
	LuxRender	LuxCoreRender is a physically based and unbiased rendering engine. Based on state of the art algorithms, LuxCoreRender simulates the flow of light according to physical equations, thus producing realistic images of photographic quality.	Apache-2.0
	Mitsuba	Mitsuba 2 is a research-oriented retargetable rendering system, written in portable C++17 on top of the Enoki library. It is developed by the Realistic Graphics Lab at EPFL.	GPL-3.0
	OpenSpace3D	OpenSpace3D is a free and open-source platform, designed to create virtual and augmented-reality applications or games. If you are a 3D artist, a designer, a lab researcher, or just someone with a lot of passion and curiosity, you don’t need software development skills to use our platform.	LGPL-3.0
	Scribus	Scribus is a page layout and desktop publishing program. Scribus supports professional publishing features, such as CMYK colors, spot colors, ICC color management and versatile PDF creation. Scribus has many unexpected touches, such as powerful vector drawing tools, support for a huge number of file types via import/export filters, emulation of color blindness or the rendering of markup languages like LaTeX or Lilypond inside Scribus. The Scribus file format is XML-based and open.	LGPL-2.1

Geometry scanning and processing

Geometry scanning and processing relates to the task of laser scanning, as-built verification, point cloud manipulation, photogrammetry, and mesh reconstruction.

	Name	Description	License
	CloudCompare	CloudCompare is a 3D point cloud (and triangular mesh) processing software. It was originally designed to perform comparison between two 3D points clouds (such as the ones obtained with a laser scanner) or between a point cloud and a triangular mesh. It relies on an octree structure that is highly optimized for this particular use-case. It was also meant to deal with huge point clouds.	GPL-2.0
	COLMAP	COLMAP is a general-purpose, end-to-end image-based 3D reconstruction pipeline (i.e., Structure-from-Motion (SfM) and Multi-View Stereo (MVS)) with a graphical and command-line interface. It offers a wide range of features for reconstruction of ordered and unordered image collections.	BSD
	GeoEasy	Land survey import and processing software GeoEasy can import files from various Total stations, perform transformations and surveying calculations, create TINs from points and breaklines, do volume differences between TINs, etc.	GPL-2.0
	MeshLab	MeshLab is the open source system for processing and editing 3D triangular meshes. It provides a set of tools for editing, cleaning, healing, inspecting, rendering, texturing and converting meshes. It offers features for processing raw data produced by 3D digitization tools/devices and for preparing models for 3D printing.	GPL-3.0
	Open Drone Map	Generate maps, point clouds, DEMs and 3D models from aerial images.	GPL-3.0/MPL-2
	Point Cloud Visualizer	Blender add-on. Display, edit, filter, render, convert, generate and export colored point cloud PLY files in Blender.	GPL-2.0
	Regard3D	A free and open source structure-from-motion program. It converts photos of an object, taken from different angles, into a 3D model of this object.	MIT license
	gradslam	For usage in instant reality capture, gradslam is an open-source framework providing differentiable building blocks for simultaneous localization and mapping (SLAM) systems. We enable the usage of dense SLAM subsystems from the comfort of PyTorch.	MIT license
	Total Open Station	Total Open Station (TOPS) downloads land survey data from total stations on your computer, from almost any operating system. Data you download can be archived as is, and exported to exchange formats (CSV, DXF, GeoJSON, ...) for use in CAD or GIS software.	GPL-3.0

CAD / BIM Design Development

Icon	Name	Description	License	Code
	Archipack	Blender add-on. Quickly model parametric architectural objects in Blender, with a real-time, on-screen editing interface, designed for speed.	GPL-3.0	Not publicly hosted
	BHoM	"The Buildings and Habitats object Model. A collaborative computational development project and collective experiment. By sharing and co-creating code we can better shape our environment and our future. We want technology to be open and accessible for all. And we think that by working together we can solve harder more impactful problems for the world."	LGPL-3.0	GitHub
	BlenderBIM Add-on	Blender add-on. An add-on for beautiful, detailed, and data-rich OpenBIM with Blender. Create data-rich IFC4 data to future-proof your BIM data and integrate with the rest of the OpenBIM ecosystem.	LGPL-2.0	Github
	Blender Add-on: CAD Transform	Blender add-on. CAD like transform operations for blender 2.8+	GPL-3.0	Not publicly hosted
	COMPAS	"A computational framework for collaboration and research in Architecture, Engineering, Fabrication, and Construction"	MIT	Github
	DynFreeCAD	Dynamo nodes for the FreeCAD API	MIT	Github
-	Home Builder Asset Library	A PyClone Blender asset library designed to help with architectural and interior design	GPL-3.0	Github
	BRL-CAD	BRL-CAD is a powerful open source cross-platform solid modeling system that includes interactive geometry editing, high-performance ray-tracing for rendering and geometric analysis, a system performance analysis benchmark suite, geometry libraries for application developers, and more than 30 years of active development.	BSD / LGPL	SourceForge
	FreeCAD	FreeCAD is an open-source, extensible, parametric 2D and 3D modeler primarily designed for mechanical engineering but which can be used in many different fields like machining, routing, 3D printing, finite element analysis, and of course, architecture and construction. Parametric modeling allows you to modify your design by going back into your model history and changing its parameters	LGPL-2.0	Github
	LibreCAD	LibreCAD is a free Open Source 2D CAD application for Windows, Apple and Linux. Support and documentation are free from our large, dedicated community of users, contributors and developers.	GPL-2.0	SourceForge
	Blender Add-on: MeasureIt-ARCH	Blender add-on. An expansion of Antonio Vazquez's MeasureIt add-on to add features to create Architectural Drawings and 3D measurements in Blender 2.8.	GPL-3.0	Github
	Prism	Prism is an open source app which accelerates the design process for precision manufactured housing (PMH) for London. It is free and easy to use and combines the Mayor of London’s spatial planning rules with precision manufacturer expertise to help you to quickly determine viable PMH options for your development.	MIT
-	PyFlow	PyFlow is a general purpose visual scripting framework for python.	Apache-2.0	Github
	QCAD	QCAD is a free, open source application for computer aided drafting (CAD) in two dimensions (2D). With QCAD you can create technical drawings such as plans for buildings, interiors, mechanical parts or schematics and diagrams. QCAD works on Windows, macOS and Linux.	GPL-3.0	Github
	SolveSpace	Small but capable parametric 2d/3d CAD application. Highly interactive, and well documented. Modeling is currently limited to extrusions, rotational objects and boolean operations. Probably a good starting point for learning the basics of constraint-based modeling. Stable version (2.3) in debian repository and released for Mac and Windows, more recent binaries for Linux can be found e.g. on notesalexp.org.	GPL-3.0	Github
	Sorcar	Blender add-on. Sorcar is a procedural modeling node-based system which utilizes Blender and its Python API to create a visual programming environment for artists and developers. Heavily inspired by Side-FX Houdini, it presents a node editor with a variety of modular nodes to make the modelling workflow easier and fast.	GPL-3.0	Github
	Speckle	Speckle is an open source cloud-based data platform for AEC. It provides a method of liberating data from one platform to another in a quick, manageable, and efficient way. It works with Blender, ThreeJS, Rhino, Grasshopper, Excel, Unity, GSA, Revit, and Dynamo.	MIT	Github
	Sverchok	Blender add-on. Sverchok is a parametric tool for architects and designers for Blender. You can use it to program objects' shapes without knowing any programming languages. Sverchok has been inspired by Grasshopper from Rhino 3D and it uses a similar node-based visual programming principle. We are trying to bring this feature set to Blender users.	GPL-3.0	Github
	Tissue	Blender add-on. Create parametric and tessellated panels in Blender, for computational design.	GPL-2.0	Github
	Topologic	Topologic is a software modelling library enabling hierarchical and topological representations of architectural spaces, buildings and artefacts through non-manifold topology.	AGPL-3.0	Github
	Construction Lines Add-on	Blender add-on. Construction Lines Add-on for Blender, is currently under development (July 2020) and enables accurate modeling with a CAD-like workflow (though can be used in any modeling), building models from 2D primitives, setting out geometry with guide points and guidelines. A beta release is imminent.	unknown

OpenBIM Management

Icon	Name	Description	License
-	BCF-Plugin-FreeCAD	"It is a standalone plugin for the free, open source CAD tool FreeCAD. The aim is it to integrate collaboration in the BIM space through support of BCF."	LGPL-3.0
	BIMData	A simple online tool to deal with IFC and BCF. Has an electronic document management, issue management, visualise, check, and share digital models.	LGPL-3.0
	BIMServer	BIMserver.org is an open source development and has been a leader in the openBIM world for more than 10 years. The open source BIM community works together to create a best-of-class BIM-environment, including the Netherlands Organisation for Applied Scientific Research, TNO, who has been at the forefront of the development of this software for many years.	AGPL-3.0
-	BIMTester	Write unit tests to check exchange requirements in IFCs and perform quality auditing of IFC data, based off Python behave.	LGPL-2.0
-	BIMSurfer	WebGL-based IFC model viewer with support for 3D tiles with a focus on high performance.	MIT
	IFCCOBie	CLI tool to convert COBie data from an IFC file to spreadsheet format, and log all IFC errors that occur during the conversion process.	LGPL-3.0
	IFCDiff	CLI tool to compare geometric and data differences between two IFC files and produce a diff report in JSON format.	LGPL-3.0
-	IFC.js	A front-end IFC viewer. Parsing is done via the browser.	MIT
-	IFC-Pipeline	A processing queue that uses IfcOpenShell to convert IFC input files into a graphic display using glTF 2.0 and BIMSurfer2 for web-based visualization.	MIT
	IfcQuery/IFC++ (IfcPlusPlus)	C++ library and IFC viewer application for Windows and Linux	MIT and closed source
	Sloth	Sloth is a BIM Collaboration Format (BCF) online viewer and report generator.	MIT

Analysis and Simulation

See also Structural Analysis & Environmental Analysis

Icon	Name	Description	License
	blastFoam	A CFD solver, built on top of OpenFOAM,for multi-component compressible flow with application to high-explosive detonation, explosive safety and air blast.	GPL-3.0
	BIMxBEM	A tool which analyze IFC data to feed local standards compliant energy related data to energy simulation softwares.	LGPL-3.0
	CalculiX	CalculiX is a package designed to solve field problems. The method used is the finite element method. With CalculiX Finite Element Models can be built, calculated and post-processed.	GPL-2.0
	CEA	The City Energy Analyst (CEA) is an urban energy simulation platform and one of the first open-source computational tools for the design of low-carbon and highly efficient neighborhoods and districts. The CEA combines knowledge of urban planning and energy systems engineering in an integrated framework. This allows to study the effects, trade-offs and synergies of urban design options, building retrofits and energy infrastructure plans. https://github.com/architecture-building-systems/CityEnergyAnalyst	MIT
	Code_Aster	Code_Aster offers a full range of multiphysical analysis and modelling methods that go well beyond the standard functions of a thermo mechanical calculation code: from seismic analysis to porous media via acoustics, fatigue, stochastic dynamics,etc.	GPL-3.0
	Code_Saturne	Code_Saturne is the free, open-source software developed and released by EDF to solve computational fluid dynamics (CFD) applications. It solves the Navier-Stokes equations for 2D, 2D-axisymmetric and 3D flows, steady or unsteady, laminar or turbulent, incompressible or weakly dilatable, isothermal or not, with scalars transport if required.	GPL-2.0
	depthmapX	depthmapX is an open-source and multi-platform spatial analysis software for spatial networks of different scales, from buildings and small urban areas to whole cities or states. At each scale, the aim of the software is to produce a map of spatial elements and connect them via relationship (for example, intervisibility, intersection or adjacency) and then perform a graph analysis of the resulting network. The objective of the analysis is to derive variables which may have social or experiential significance.	GPL-3.0
	Elmer	Elmer is a multiphysical simulation software that includes physical models of fluid dynamics, structural mechanics, electromagnetics, heat transfer and acoustics, for example. These are described by partial differential equations which Elmer solves by the Finite Element Method (FEM).	GPL-2.0 (software) and LGPL-2.1 (solver)
	EnergyPlus	EnergyPlus™ is a whole building energy simulation program that engineers, architects, and researchers use to model both energy consumption—for heating, cooling, ventilation, lighting and plug and process loads—and water use in buildings.	BSD-Style
	EPANet	EPANet is a software application used throughout the world to model water distribution systems. It was developed as a tool for understanding the movement and fate of drinking water constituents within distribution systems, and can be used for many different types of applications in distribution systems analysis.	MIT
	Fino	Fino is a free and open source tool that uses the finite-element method to solve (i) steady-state thermo-mechanical problems, or (ii) steady or transient heat conduction problems, or (iii) modal analysis problems.	GPL-3.0
	Fire Dynamics Simulator (FDS)	Fire Dynamics Simulator (FDS) is a large-eddy simulation (LES) code for low-speed flows, with an emphasis on smoke and heat transport from fires.	NIST
	FEniCS	FEniCS is a computing platform for solving partial differential equations (PDEs). FEniCS enables users to quickly translate scientific models into efficient finite element code. FEniCS runs on a multitude of platforms ranging from laptops to high-performance clusters.	LGPL-3.0
	Frame3DD	Frame3DD is free open-source software for static and dynamic structural analysis of 2D and 3D frames and trusses with elastic and geometric stiffness. It computes the static deflections, reactions, internal element forces, natural frequencies, mode shapes and modal participation factors of two- and three- dimensional elastic structures using direct stiffness and mass assembly. Note there is also pyFrame3DD for Python.	GPL-3.0
	GemPy	GemPy is a tool for generating 3D structural geological models in Python. As such, it enables you to create complex combinations of stratigraphical and structural features such as folds, faults, and unconformities. It was furthermore designed to enable probabilistic modeling to address parameter and model uncertainties.	GPL-3.0
	Gmsh	Gmsh is an open source 3D finite element mesh generator with a built-in CAD engine and post-processor. Its design goal is to provide a fast, light and user-friendly meshing tool with parametric input and advanced visualization capabilities. Gmsh is built around four modules: geometry, mesh, solver and post-processing.	LGPL-2.0
	Ladybug Tools	Ladybug Tools is a collection of free computer applications that support environmental design and education connecting 3D Computer-Aided Design (CAD) interfaces to a host of validated simulation engines. Ladybug Tools can be used as a suite of Python libraries, or as a set of visual programming nodes with Blender (via Sverchok), or with proprietary software like Rhino (via Grasshopper) or Revit (via Dynamo).	GPL-3.0
	OpenFOAM	OpenFOAM is the free, open source CFD software developed primarily by OpenCFD Ltd since 2004. It has a large user base across most areas of engineering and science, from both commercial and academic organisations. OpenFOAM has an extensive range of features to solve anything from complex fluid flows involving chemical reactions, turbulence and heat transfer, to acoustics, solid mechanics and electromagnetics.	GPL-3.0
	OpenSees	OpenSees is a software framework for developing applications to simulate the performance of structural and geotechnical systems subjected to earthquakes.	UC Regents
	OpenStudio	OpenStudio® is a cross-platform (Windows, Mac, and Linux) collection of software tools to support whole building energy modeling using EnergyPlus and advanced daylight analysis using Radiance. OpenStudio is an open source (LGPL) project to facilitate community development, extension, and private sector adoption. OpenStudio includes graphical interfaces along with a Software Development Kit (SDK).	LGPL-Style
	ParaView	ParaView is an open-source, multi-platform data analysis and visualization application. ParaView users can quickly build visualizations to analyze their data using qualitative and quantitative techniques. The data exploration can be done interactively in 3D or programmatically using ParaView’s batch processing capabilities.	BSD
	pythermalcomfort	pythermalcomfort is a Python package that allows users to calculate the most common thermal comfort indices in compliance with the main thermal comfort standards such as ASHRAE 55 and ISO 7730. For example, pythermalcomfort can be used to calculate: thermal comfort indices (e.g., Predicted Mean Vote, adaptive models, Standard Equivalent Temperature), local discomfort, clothing insulation, and psychrometric properties of air.	MIT
	Radiance	Radiance is a suite of programs for the analysis and visualization of lighting in design. Input files specify the scene geometry, materials, luminaires, time, date and sky conditions (for daylight calculations). Calculated values include spectral radiance (ie. luminance + color), irradiance (illuminance + color) and glare indices. Simulation results may be displayed as color images, numerical values and contour plots.	Project-specific FOSS
	Salome	SALOME is an open-source software that provides a generic Pre- and Post-Processing platform for numerical simulation. It is based on an open and flexible architecture made of reusable components.	LGPL-2.1
	Syrthes	SYRTHES is a general thermal software dedicated to transient thermal simulations in complex solid geometries. EDF's R&D developed the software that can be used for a range of problems: nuclear (lifetime, nuclear waste disposal, new concepts, fuel transportation, etc.), electricity (transport, electromechanical devices, etc.), building efficiency, material physical properties, etc.	GPL-2.0
	VI-Suite	Blender Add-on. VI-Suite is a node-based add-on for performing environmental analysis in blender. The add-on acts as a pre/postprocessor for the EnergyPlus and Radiance simulation engines. Stable Version (0.4) released for blender 2.7, a version for blender 2.8 (0.6) is awaiting release.	various FOSS
	Raster Vision Building Detection	Code for running a Raster Vision experiment to train a model to detect buildings from satellite imagery in three cities in Latin America. Part of the Open Urban Planning Toolbox developed by the Inter-American Development Bank.	CC-IGO 3.0 BY-NC-ND
	Urban Growth Prediction Model	Code to run a model that predicts urban growth using a spatially-explicit stochastic land change modelling framework to produce projections of urban growth in a designated urban area and its surroundings. Part of the Open Urban Planning Toolbox developed by the Inter-American Development Bank.	CC-IGO 3.0 BY-NC-ND
	OpenStreetMap Extraction Tool	Friendly front-end for querying OSM features around Guyana from the Overpass API and extracting them as a Shapefile. Part of the Open Urban Planning Toolbox developed by the Inter-American Development Bank.	CC-IGO 3.0 BY-NC-ND
	OpenMapKit Server	OpenMapKit Server is the lightweight NodeJS server component of OpenMapKit that handles the collection and aggregation of OpenStreetMap and OpenDataKit data. Part of the Open Urban Planning Toolbox developed by the Inter-American Development Bank.	CC-IGO 3.0 BY-NC-ND
	Housing Deficit Estimation	Understanding housing deficit is crucial in creating housing policy. The code contained in this repo will apply a decisive methodology to determine levels of quantitative, qualitative, and total housing deficit based on census data, using census data as an example. Part of the Open Urban Planning Toolbox developed by the Inter-American Development Bank.	CC-IGO 3.0 BY-NC-ND
	Georeferenced Program Evaluation	The GPE (Georeferenced Program Evaluation) R package includes functions that will allow the user to study various aspects of consumer or beneficiary behavior. Part of the Open Urban Planning Toolbox developed by the Inter-American Development Bank.	CC-IGO 3.0 BY-NC-ND
	WhiteboxTools	WhiteboxTools can be used to perform common geographical information systems (GIS) analysis operations	MIT
	UrbanPy	UrbanPy is an open source project to automate data extraction, measurement, and visualization of urban accessibility metrics. Part of the Open Urban Planning Toolbox developed by the Inter-American Development Bank.	CC-IGO 3.0 BY-NC-ND
	XC	XC OSS is aimed directly at civil structural engineering. The software provides a set of structural analysis tools based on the finite element method and a framework to implement the design of structural members according to structural codes (Eurocodes, ACI, ...). Our objective is to develop an open tool that provides the engineer with unlimited freedom to take control of the structural analysis and to customize procedures.	Project-specific FOSS

Project Management

Icons	Name	Description	License
	GanttProject	GanttProject is a free desktop project scheduling application for small and medium businesses which need Gantt charts.	GPL-3.0
	OpenProject	OpenProject is the leading open source project management software. Support your project management process along the entire project life cycle: From project initiation to closure. Includes support for BCF[1]	GPL-3.0
	ProjectLibre	ProjectLibre is a free and open-source project management software system intended ultimately as a standalone replacement for Microsoft Project. ProjectLibre was developed by the founders of the abandoned project OpenProj.	CPAL
	ProjeQtOr	ProjeQtOr is a collaborative and free open source project management software. It's a tool designed to be a Project Organizer as a Rich Internet Application. Web mode, once installed, you can work from the web browser.	AGPL-3.0

Facility Management

Icon	Name	Description	License
	openMAINT	openMAINT is the application for the management of mobile assets, plants and technical devices, furniture, etc., and the related logistical, economical and maintenance activities, scheduled and breakdown ones.	AGPL-3.0 & GPL-3.0
	Vi-Sense	Vi-Sense is a project that visualizes data of heating systems in a 3D model of the building they're installed in. Technicians or system administrators get an overview of all sensors located in a building, can take a closer look at the measured values of these sensors, and get information about data anomalies that indicate potential errors. The combination of the 3D representation of buildings and the visualization of measured values in a timeline makes it possible to perform detailed analyses of error sources such as the failure of heating or pump systems. In addition, sensor states in the building model are supported by color highlighting, which ensures a quick orientation and an intuitive overview.	MIT

Software Development

If you are a software developer, you may be interested in a wide variety of free software libraries available to aid development of new free software tools in the AEC industry. Tools include file format parsers, geometry kernels, a visualisation libraries. See free software libraries for AEC software development.

Extensions to proprietary software

Some software is distributed as free software, but only as an extension, an add-on, plug-in, or only operating in conjunction with proprietary software. As it cannot be used practically without proprietary software, it is not considered "fully" free software. Sometimes, though not always, they are released as open source as a marketing strategy to seem more open, or as a way to attempt to get free community contributions to an otherwise proprietary core. See the directory of free software extensions to proprietary software.