List of free and open-source software packages

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This is a list of free and open-source software packages, computer software licensed under free software licenses and open-source licenses. Software that fits the Free Software Definition may be more appropriately called free software; the GNU project in particular objects to their works being referred to as open-source.[1] For more information about the philosophical background for open-source software, see free software movement and Open Source Initiative. However, nearly all software meeting the Free Software Definition also meets the Open Source Definition and vice versa. A small fraction of the software that meets either definition is listed here.

Some of the open-source applications are also the basis of commercial products, shown in the List of commercial open-source applications and services.

Artificial intelligence


  • OpenCog – A project that aims to build an artificial general intelligence (AGI) framework. OpenCog Prime is a specific set of interacting components designed to give rise to human-equivalent artificial general intelligence.

Computer Vision

Machine Learning


  • TREX – Reactive planning


  • ROS – Robot Operating System
  • Webots – Robot Simulator
  • YARP – Yet Another Robot Platform

Assistive technology

Speech (synthesis and recognition)

  • CMU Sphinx – Speech recognition software from Carnegie Mellon University
  • Emacspeak – Audio desktop
  • ESpeak – Compact software speech synthesizer for English and other languages
  • Festival Speech Synthesis System – General multilingual speech synthesis
  • Modular Audio Recognition Framework – Voice, audio, speech NLP processing
  • NonVisual Desktop Access – (NVDA) Screen reader, for Windows
  • Text2Speech – Lightweight, easy-to-use Text-To-Speech (TTS) Software

Other assistive technology

  • Dasher – Unique text input software
  • Gnopernicus – AT suite for GNOME 2
  • Virtual Magnifying Glass – A multi-platform screen magnification tool


  • FreeCAD – Parametric 3D CAD modeler with a focus on mechanical engineering, BIM, and product design
  • LibreCAD – 2D CAD software using AutoCAD-like interface and file format

Electronic design automation (EDA)

  • Fritzing
  • KiCad

Computer simulation

  • Blender – 3D computer graphics software toolset used for creating animated films, visual effects, art, 3D printed models, and motion graphics.
  • FlightGear - atmospheric and orbital flight simulator with a flight dynamics engine (JSBSim) that is used in a 2015 NASA benchmark[2] to judge new simulation code to space industry standards.
  • SimPy – Queue-theoretic event-based simulator written in Python



  • ClamAV
  • ClamWin
  • Gateway Anti-Virus
  • Lynis

Data loss prevention

  • MyDLP

Data recovery

  • dvdisaster
  • Foremost
  • PhotoRec
  • TestDisk


  • The Coroner's Toolkit
  • The Sleuth Kit
  • USBKill

Disk erasing

  • DBAN
  • srm


  • AES
  • Bouncy Castle
  • GnuPG
  • GnuTLS
  • KGPG
  • NaCl
  • OpenSSL
  • Seahorse
  • Signal
  • stunnel
  • TextSecure
  • wolfCrypt

Disk encryption

  • dm-crypt
  • CrossCrypt
  • FreeOTFE and FreeOTFE Explorer
  • eCryptfs


  • Uncomplicated Firewall (ufw)
  • Firestarter
  • IPFilter
  • ipfw
  • iptables
  • M0n0wall
  • PeerGuardian
  • PF
  • pfSense
  • Rope
  • Shorewall
  • SmoothWall
  • Vyatta

Network and security monitoring

  • Snort – Network intrusion detection system (IDS) and intrusion prevention system (IPS)
  • OpenVAS – software framework of several services and tools offering vulnerability scanning and vulnerability management

Secure Shell (SSH)

  • Cyberduck – macOS and Windows client (since version 4.0)
  • Lsh – Server and client, with support for SRP and Kerberos authentication
  • OpenSSH – Client and server
  • PuTTY – Client-only

Password management

  • Bitwarden
  • KeePass
  • KeePassXC (multiplatform fork able to open KeePass databases)
  • Password Safe
  • Mitro
  • Pass

Other cybersecurity programs

Data storage and management

Backup software

Database management systems (including administration)

Data mining

  • Environment for DeveLoping KDD-Applications Supported by Index-Structures (ELKI) – Data mining software framework written in Java with a focus on clustering and outlier detection methods
  • FrontlineSMS – Information distribution and collecting via text messaging (SMS)
  • Konstanz Information Miner (KNIME)
  • OpenNN – Open-source neural networks software library written in C++
  • Orange (software) – Data visualization and data mining for novice and experts, through visual programming or Python scripting. Extensions for bioinformatics and text mining
  • RapidMiner – Data mining software written in Java, fully integrating Weka, featuring 350+ operators for preprocessing, machine learning, visualization, etc. – the previous version is available as open-source
  • Scriptella ETL – ETL (Extract-Transform-Load) and script execution tool. Supports integration with J2EE and Spring. Provides connectors to CSV, LDAP, XML, JDBC/ODBC, and other data sources
  • Weka – Data mining software written in Java featuring machine learning operators for classification, regression, and clustering
  • JasperSoft – Data mining with programmable abstraction layer

Data Visualization Components

  • ParaView – Plotting and visualization functions developed by Sandia National Laboratory; capable of massively parallel flow visualization utilizing multiple computer processors
  • VTK – Toolkit for 3D computer graphics, image processing, and visualisation.

Digital Asset Management software system

Disk partitioning software

Enterprise search engines

  • ApexKB, formerly known as Jumper
  • Lucene
  • Nutch
  • Solr
  • Xapian

ETLs (Extract Transform Load)

  • Konstanz Information Miner (KNIME)
  • Pentaho

File archivers

File systems

  • OpenAFS – Distributed file system supporting a very wide variety of operating systems
  • Tahoe-LAFS – Distributed file system/Cloud storage system with integrated privacy and security features
  • CephFS – Distributed file system included in the Ceph storage platform.

Desktop publishing

  • Collabora Online Draw and Writer - Enterprise-ready edition of LibreOffice accessible from a web browser. The Draw application is for flyers, newsletters, brochures and more, Writer has most of the functionality too.[3]
  • Scribus – Designed for layout, typesetting, and preparation of files for professional-quality image-setting equipment. It can also create animated and interactive PDF presentations and forms.

E-book management and editing

  • Calibre – Cross-platform suite of e-book software
  • Collabora Online Writer - Enterprise-ready edition of LibreOffice accessible from a web browser. Allows exporting in the EPUB format.[4]
  • Sigil – Editing software for e-books in the EPUB format


Educational suites

  • ATutor – Web-based Learning Content Management System (LCMS)
  • Chamilo – Web-based e-learning and content management system
  • Claroline – Collaborative Learning Management System
  • DoceboLMS – SAAS/cloud platform for learning
  • eFront – Icon-based learning management system
  • FlightPath – Academic advising software for universities
  • GCompris – Educational entertainment, aimed at children aged 2–10
  • Gnaural – Brainwave entrainment software
  • H5P – Framework for creating and sharing interactive HTML5 content
  • IUP Portfolio – Educational platform for Swedish schools
  • ILIAS – Web-based learning management system (LMS)
  • Moodle – Free and open-source learning management system
  • OLAT – Web-based Learning Content Management System
  • Omeka – Content management system for online digital collections
  • openSIS – Web-based Student Information and School Management system
  • Sakai Project – Web-based learning management system
  • SWAD – Web-based learning management system
  • Tux Paint – Painting application for 3–12 year olds
  • UberStudent – Linux based operating system and software suite for academic studies


  • KGeography – Educational game teaching geography

Learning support


  • Kiten


  • KTouch – Touch typing lessons with a variety of keyboard layouts
  • Tux Typing – Typing tutor for children, featuring two games to improve typing speed

File managers



  • GnuCash – Double-entry book-keeping
  • HomeBank – Personal accounting software
  • KMyMoney – Double-entry book-keeping
  • LedgerSMB – Double-entry book-keeping
  • RCA open-source application – management accounting application
  • SQL Ledger – Double-entry book-keeping
  • TurboCASH – Double-entry book-keeping for Windows
  • Wave Accounting – Double-entry book-keeping


  • EOS.IO – Blockchain platform, peer-to-peer decentralised digital currency


  • CiviCRM – Constituent Relationship Management software aimed at NGOs
  • iDempiere – Business Suite, ERP and CRM


  • Adempiere – Enterprise resource planning (ERP) business suite
  • Compiere – ERP solution automates accounting, supply chain, inventory, and sales orders
  • Dolibarr – Web-based ERP system
  • ERPNext – Web-based open-source ERP system for managing accounting and finance
  • Ino erp – Dynamic pull based system ERP
  • JFire – An ERP business suite written with Java and JDO
  • metasfresh – ERP Software
  • Odoo – Open-source ERP, CRM and CMS
  • Openbravo – Web-based ERP
  • Tryton – Open-source ERP

Human resources

  • OrangeHRM – Commercial human resource management


  • Cyclos – Software for microfinance institutions, complementary currency systems and timebanks
  • Mifos – Microfinance Institution management software

Process management

  • Bonita Open Solution – Business Process Management


  • jFin – Java-based trade-processing program
  • QuickFIX – FIX protocol engine written in C++ with additional C#, Ruby, and Python wrappers
  • QuickFIX/J – FIX protocol engine written in Java



  • Xonotic – First-person shooter that runs on a heavily modified version of the Quake engine known as the DarkPlaces engine
  • Warsow – First-person shooter fast-paced arena FPS game that runs on the Qfusion engine

Application layer

  • WINE – Allows Windows applications to be run on Unix-like operating systems


  • MAME – Multi-platform emulator designed to recreate the hardware of arcade game systems
  • RetroArch – Cross-platform front-end for emulators, game engines and video games


  • PingusLemmings clone with penguins instead of lemmings


  • OpenTTD – Business simulation game in which players try to earn money via transporting passengers and freight by road, rail, water and air.
  • SuperTuxKart – Kart racing game that features mascots of various open-source projects.


  • 0 A.D. – Real-time strategy video game
  • Freeciv – Turn-based strategy game inspired by the proprietary Sid Meier's Civilization series.
  • The Battle for Wesnoth – Turn-based strategy video game with a fantasy setting


  • Gramps (software) – a free and open source genealogy software.

Geographic information systems

Graphical user interface

Desktop environments

Window managers

Windowing system


Content management systems

Wiki software

Healthcare software

Integrated library management software

  • Evergreen – Integrated Library System initially developed for the Georgia Public Library Service's PINES catalog
  • Koha – SQL-based library management
  • NewGenLib
  • OpenBiblio
  • PMB
  • refbase – Web-based institutional repository and reference management software

Image editor

  • Darktable – Digital image workflow management, including RAW photo processing
  • digiKam – Integrated photography toolkit including editing capabilities
  • GIMP – Raster graphics editor aimed at image retouching/editing
  • Inkscape – Vector graphics editor
  • Karbon – Scalable vector drawing application in KDE
  • Krita – Digital painting, sketching and 2D animation application, with a variety of brush engines
  • LazPaint – Lightweight raster and vector graphics editor, aimed at being simpler to use than GIMP
  • LightZone – Free, open-source digital photo editor software application.
  • RawTherapee – Digital image workflow management aimed at RAW photo processing



  • R Statistics Software

Numerical Analysis

  • Octave - Numerical Analysis Software


  • Geogebra - Geometry and Algebra


  • LibreOffice Calc algebraic operations on table cells - descriptive data analysis


2D animation

  • Pencil2D – Simple 2D graphics and animation program
  • Synfig – 2D vector graphics and timeline based animation
  • TupiTube (formerly KTooN) – Application for the design and creation of animation
  • OpenToonz – Part of a family of 2D animation software
  • Krita – Digital painting, sketching and 2D animation application, with a variety of brush engines
  • Blender – Computer graphics software, Blender's Grease Pencil tools allow for 2D animation within a full 3D pipeline.

3D animation

  • Blender – Computer graphics software featuring modeling, sculpting, texturing, rigging, simulation, rendering, camera tracking, video editing, and compositing
  • OpenFX – Modeling and animation software with a variety of built-in post processing effects
  • Seamless3d – Node-driven 3D modeling software

Audio editors, audio management

CD/USB-writing software

Flash animation

  • Pencil2D – For animations
  • SWFTools – For scripting

Game Engines

  • Godot – Application for the design of cross-platform videogames
  • Stockfish – Universal Chess Interface chess engine
  • Leela Chess Zero – Universal Chess Interface chess engine


Image galleries

Image viewers

  • Eye of GNOME
  • F-spot
  • feh
  • Geeqie
  • Gthumb
  • Gwenview
  • KPhotoAlbum
  • Opticks

Multimedia codecs, containers, splitters


Video converters

  • Dr. DivX
  • FFmpeg
  • MEncoder
  • OggConvert

Video editing

  • Avidemux
  • AviSynth
  • Blender
  • Cinelerra
  • DScaler
  • DVD Flick
  • Flowblade
  • Kdenlive
  • Kino
  • LiVES
  • LosslessCut
  • Natron
  • Olive
  • OpenShot
  • Pitivi
  • Shotcut
  • VirtualDub
  • VirtualDubMod
  • VideoLAN Movie Creator

Video encoders

  • Avidemux
  • HandBrake
  • FFmpeg

Video players

  • Media Player Classic
  • VLC media player
  • mpv

Other media packages

  • Celtx – Media pre-production software
  • Open Broadcaster Software (OBS) – Cross-platform streaming and recording program

Networking and Internet


  • Revive Adserver


  • Asterisk – Telephony and VoIP server
  • Ekiga – Video conferencing application for GNOME and Microsoft Windows
  • ConferenceXP – video conferencing application for Windows XP or later
  • FreePBX – Front-end and advanced PBX configuration for Asterisk
  • FreeSWITCH – Telephony platform
  • Jami – Cross-platform, peer to peer instant-messaging and video-calling protocol that offers end-to-end encryption and SIP client
  • Jitsi – Java VoIP and Instant Messaging client
  • QuteCom – Voice, video, and IM client application
  • Enterprise Communications System sipXecs – SIP Communications Server
  • Slrn – Newsreader
  • Twinkle – VoIP softphone
  • Tox – Cross-platform, peer-to-peer instant-messaging and video-calling protocol that offers end-to-end encryption


  • Geary – Email client based on WebKitGTK+
  • Mozilla Thunderbird – Email, news, RSS, and chat client

File transfer

Grid and distributed processing

  • GNU Queue
  • HTCondor
  • OpenLava
  • pexec

Instant messaging

IRC Clients


  • Apache Axis2 – Web service framework (implementations are available in both Java & C)
  • Apache Geronimo – Application server
  • Bonita Open Solution – a J2EE web application and java BPMN2 compliant engine
  • GlassFish – Application server
  • Jakarta Tomcat – Servlet container and standalone webserver
  • JBoss Application Server – Application server
  • ObjectWeb JOnAS – Java Open Application Server, a J2EE application server
  • OpenRemote – IoT Middleware
  • TAO (software) – C++ implementation of the OMG's CORBA standard
  • Enduro/X – C/C++ middleware platform based on X/Open group's XATMI and XA standards

RSS/Atom readers/aggregators

  • Akregator – Platforms running KDE
  • Liferea – Platforms running GNOME
  • NetNewsWire – macOS, iOS
  • RSS Bandit – Windows, using .NET Framework
  • RSSOwl – Windows, Mac OS X, Solaris, Linux using Java SWT Eclipse
  • Sage (Mozilla Firefox extension)

Peer-to-peer file sharing

  • Popcorn Time – Multi-platform, free, and open-source media player
  • qBittorrent – Alternative to popular clients such as μTorrent
  • Transmission – BitTorrent client

Portal Server

  • Drupal
  • Liferay
  • Sun Java System Portal Server
  • uPortal

Remote access and management

  • FreeNX
  • OpenVPN
  • rdesktop
  • Synergy
  • VNC (RealVNC, TightVNC, UltraVNC)
  • Remmina

Routing software

Web browsers


  • Cheese – GNOME webcam application
  • Guvcview – Linux webcam application



  • Apache Cocoon – A web application framework
  • Apache – The most popular web server
  • AWStats – Log file parser and analyzer
  • BookmarkSync – Tool for browsers
  • Cherokee – Fast, feature-rich HTTP server
  • curl-loader – Powerful HTTP/HTTPS/FTP/FTPS loading and testing tool
  • FileZilla – FTP
  • Hiawatha – Secure, high performance, and easy-to-configure HTTP server
  • HTTP File Server – User-friendly file server software, with a drag-and-drop interface
  • lighttpd – Resource-sparing, but also fast and full-featured, HTTP Server
  • Lucee – CFML application server
  • Nginx – Lightweight, high performance web server/reverse proxy and e-mail (IMAP/POP3) proxy
  • NetKernel – Internet application server
  • Qcodo – PHP5 framework
  • Squid – Web proxy cache
  • Vaadin – Fast, Java-based framework for creating web applications
  • Varnish – High-performance web application accelerator/reverse proxy and load balancer/HTTP router
  • XAMPP – Package of web applications including Apache and MariaDB
  • Zope – Web application server

Web search engines

  • Searx – Self-hostable metasearch engine
  • YaCy – P2P-based search engine

Other networking programs

  • JXplorer – LDAP client
  • Nextcloud – A fork of ownCloud
  • OpenLDAP – LDAP server
  • ownCloud – File share and sync server
  • Wireshark – Network monitor

Office suites

  • Apache OpenOffice (formerly known as
  • Calligra Suite – The continuation of KOffice under a new name
  • Collabora Online - Enterprise-ready edition of LibreOffice, web application, mobile phone, tablet, Chromebook and desktop (Windows, macOS, Linux)[5]
  • LibreOffice – Independent Work of with a number of enhancements
  • ONLYOFFICE Desktop Editors – An open-source offline edition of the Cloud

Operating systems

Be advised that available distributions of these systems can contain, or offer to build and install, added software that is neither free software nor open-source.

Emulation and Virtualisation

  • DOSBox – DOS programs emulator (including PC games)
  • VirtualBox – hosted hypervisor for x86 virtualization

Personal information managers

  • Chandler – Developed by the OSAF
  • KAddressBook
  • Kontact
  • KOrganizer
  • Mozilla Calendar – Mozilla-based, multi-platform calendar program
  • Novell Evolution
  • Perkeep – Personal data store for pictures
  • – Commercial Project Management
  • TeamLab – Platform for project management and collaboration

Programming language support

Bug trackers

Code generators

  • Bison
  • CodeSynthesis XSD – XML Data Binding compiler for C++
  • CodeSynthesis XSD/e – Validating XML parser/serializer and C++ XML Data Binding generator for mobile and embedded systems
  • Flex lexical analyser – Generates lexical analyzers
  • Kodos
  • Open Scene Graph – 3D graphics application programming interface
  • OpenSCDP – Open Smart Card Development Platform
  • phpCodeGenie
  • SableCC – Parser generator for Java and .NET
  • SWIG – Simplified Wrapper and Interface Generator for several languages
  • ^txt2regex$
  • xmlbeansxx – XML Data Binding code generator for C++
  • YAKINDU Statechart Tools – Statechart code generator for C++ and Java

Documentation generators

  • Doxygen – Tool for writing software reference documentation. The documentation is written within code.
  • Mkd – The software documentation is extracted from the sources files, from pseudocode or comments.
  • Natural Docs – Claims to use a more natural language as input from the comments, hence its name.

Configuration software

  • Autoconf
  • Automake
  • BuildAMation
  • CMake

Debuggers (for testing and trouble-shooting)

  • GNU Debugger – A portable debugger that runs on many Unix-like systems
  • Memtest86 – Stress-tests RAM on x86 machines
  • Xnee – Record and replay tests

Integrated development environments

Version control systems

Reference management software

Risk Management




  • Chemistry Development Kit
  • JOELib
  • OpenBabel

Electronic Lab Notebooks

  • ELOG
  • Jupyter

Geographic Information Systems


Grid computing

  • P-GRADE Portal – Grid portal software enabling the creation, execution and monitoring of workflows through high-level Web interfaces

Microscope image processing

  • CellProfiler – Automatic microscopic analysis, aimed at individuals lacking training in computer vision
  • Endrov – Java-based plugin architecture designed to analyse complex spatio-temporal image data
  • Fiji – ImageJ-based image processing
  • Ilastik – Image-classification and segmentation software
  • ImageJ – Image processing application developed at the National Institutes of Health
  • IMOD – 2D and 3D analysis of electron microscopy data
  • ITK – Development framework used for creation of image segmentation and registration programs
  • KNIME – Data analytics, reporting, and integration platform
  • VTK – C++ toolkit for 3D computer graphics, image processing, and visualisation
  • 3DSlicer – Medical image analysis and visualisation

Molecular dynamics

  • GROMACS – Protein, lipid, and nucleic acid simulation
  • LAMMPS – Molecular dynamics software
  • MDynaMix – General-purpose molecular dynamics, simulating mixtures of molecules
  • NWChem – Quantum chemical and molecular dynamics software

Molecule viewer

  • Avogadro – Plugin-extensible molecule visualisation
  • BALLView – Molecular modeling and visualisation
  • Jmol – 3D representation of molecules in a variety of formats, for use as a teaching tool
  • Molekel – Molecule viewing software
  • MeshLab – Able to import PDB dataset and build up surfaces from them
  • PyMOL – High-quality representations of small molecules as well as biological macromolecules
  • QuteMol – Interactive molecule representations offering an array of innovative OpenGL visual effects
  • RasMol – Visualisation of biological macromolecules


  • Ninithi – Visualise and analyse carbon allotropes, such as Carbon nanotube, Fullerene, Graphene nanoribbons


  • Veusz

Quantum chemistry

  • CP2K – Atomistic and molecular simulation of solid-state, liquid, molecular, and biological systems


  • Electric Sheep
  • XScreenSaver


  • R Statistics Software
  • LimeSurvey – Online survey system


Bible study tools

  • Go Bible – A free Bible viewer application for Java mobile phones
  • Marcion – Coptic–English/Czech dictionary
  • OpenLP – A worship presentation program licensed under the GNU General Public License
  • The SWORD Project – The CrossWire Bible Society's free software project


See also

General directories

  • AlternativeTo
  • CodePlex
  • Free Software Directory
  • Freecode
  • Open Hub
  • SourceForge


  1. ^ Richard Stallman (July 13, 2011). "Why Open Source misses the point of Free Software". Retrieved August 24, 2011.
  2. ^ "Further Development of Verification Check-casesforSix-Degree-of-Freedom Flight Vehicle Simulations" (PDF). NASA Engineering and Safety Center Academy. 2015. Archived (PDF) from the original on March 10, 2021.
  3. ^ "Create great flyers, newsletters, brochures and more with open source software".
  4. ^ Bärwaldt, Eric (2020). "Collaborative online office solutions". Admin Network & Security. 60/2020. ...users can also convert text files to the ePub format for displaying appear on ebook readers or with desktop software for reading ePub files.
  5. ^ Bärwaldt, Eric (2020-09-01). "Working Together Tools for collaborative office work". Linux Magazine (238/2020). For cross-platform use, the suite not only supports the Open Document Format (ODF) but also all newer Microsoft formats, which makes interaction with other office suites easier.

External links

Edited: 2021-06-18 14:12:53