Conversations.im
An open source instant messaging client and ecosystem based on Jabber & XMPP
- 2026
- –
- Cycles
- 2
- Projects
- 4
- Trend
DIRECTORY
522 organizations since 2016
Filter by stack, capacity and track record. Every number comes from Google's public archive.
Discourse
Civilized discussion for your community.
- 2026
- –
- Cycles
- 2
- Projects
- 6
- Trend
GNU Mailman
The Mailman project develops the GNU Mailman mailing list manager. Our goals are RFC conformance and powerful convenient tools for subscribers, moderators, list owners, domain administrators, and site adminstrators of mailing lists.
- 2026
- 4
- Cycles
- 1
- Projects
- 4
- Trend
GNU Mailman Project
GNU Mailman is a mailing list manager popular in open source projects.
- 2026
- –
- Cycles
- 3
- Projects
- 4
- Trend
Moodle
Empowering educators to improve our world
- 2026
- –
- Cycles
- 4
- Projects
- 7
- Trend
OpenSIPS
A multi-purpose Open Source SIP proxy/server for carriers, telecoms or ITSPs
- 2026
- –
- Cycles
- 1
- Projects
- 0
- Trend
OpnTec
Developing Open Event Solutions for Everyone
- 2026
- –
- Cycles
- 1
- Projects
- 2
- Trend
phpBB Forum Software
phpBB is the most widely used free and open-source forum solution.
- 2026
- –
- Cycles
- 2
- Projects
- 4
- Trend
rocket.chat
Open source team chat and communications platform
- 2026
- 10
- Cycles
- 10
- Projects
- 113
- Trend
The Palisadoes Foundation
Social media and member management for non-profits
- 2026
- –
- Cycles
- 5
- Projects
- 36
- Trend
Contributor counts are accepted projects per cycle.
A TO Z
Every organization since 2016
A
- AboutCode
- Academy Software Foundation
- Accord Project
- AerospaceResearch.net
- AFLplusplus
- aimacode
- Alaska
- Amahi
- Android Graphics Tools Team
- AnitaB.org Open Source
- AnkiDroid
- AOSSIE
- AOSSIE - The Australian National University's Open-Source Software Innovation and Education
- Apache DataFusion
- Apache Software Foundation
- Apertium
- Apertus Association
- API Client Tools at Google
- API Dash
- appleseed
- ArchC
- Arduino
- ArduPilot
- ASCEND
- AsyncAPI
- Audacity
B
C
- C2SI
- Cadasta
- caMicroscope
- Canadian Centre for Computational Genomics
- Carbon Language
- Casbin
- CASTOR
- cBioPortal for Cancer Genomics
- CBMI@UTHSC
- CCExtractor Development
- Celluloid
- Center for Research in Open Source Software (CROSS)
- Center for Translational Data Science
- Ceph Foundation
- CERN SFT
- CERN-HSF
- CGAL Project
- CHAOSS
- Chapel
- Checker Framework
- checkstyle
- CHIPS Alliance
- Chromium
- Cilium
- CircuitVerse.org
- City of Boston
- CiviCRM
- Classical Language Toolkit
- CLiPS, University of Antwerp
- Clojure
- CloudCV
- CMU Sphinx
- CNCF
- coala
- Cockpit Project
- Computational Biology @ University of Nebraska-Lincoln
- Computational Science and Engineering at TU Wien
- Continuous Delivery Foundation
- Conversations.im
- Copyleft Games
- coreboot
- Creative Commons
- CRIU
- Cuneiform Digital Library Initiative (CDLI)
- CVAT
- CVXPY
D
- D Language Foundation
- Dart
- Data for the Common Good
- DatenLord
- DBpedia
- Debian
- DeepChem
- DeepPavlov
- Department of Biomedical Informatics, Emory University
- Developers Italia
- Digital Impact Alliance (DIAL) at UN Foundation
- Discourse
- Distributed and Unified Numerics Environment (DUNE)
- Django Software Foundation
- dora-rs
- Drupal Association
E
F
G
- Gambit - Software Tools for Game Theory
- Gambit: The package for computation in game theory
- Ganeti
- GCP Scanner
- GDevelop
- Gemini CLI
- Genes, Genomes and Variation
- GENIVI Alliance
- Genome Assembly and Annotation
- Gentoo Foundation
- GeomScale
- German Center for Open Source AI
- Git
- GitHub
- GitLab
- Global Alliance for Genomics and Health
- GNOME Foundation
- GNSS-SDR
- GNU Compiler Collection (GCC)
- GNU Image Manipulation Program
- GNU Mailman
- GNU Mailman Project
- GNU Octave
- GNU Project
- GNU Radio
- GnuTLS
- Godot Engine
- Google DeepMind
- Google FHIR SDK
- GPAC
- gprMax
- GRAME
- Graphite
- GraphQL Foundation
- Green Navigation
- gRPC
- GRR Rapid Response
- gVisor
I
- illumos.org
- INCF
- Inclusive Design Institute
- Indic Project
- Inkscape
- Inria Foundation
- Institut für Angewandte Informatik (InfAI) e.V.
- Institute for Artificial Intelligence
- Intel Video and Audio for Linux
- InterMine
- International Catrobat Association
- Internet Archive
- Internet Health Report
- Internet Systems Consortium
- Invesalius
- IOOS
- Ivy (lets-unify.ai)
J
K
L
M
- Machine Learning for Science (ML4SCI)
- MacPorts
- MalariaGEN
- Mantis
- MapAction
- MariaDB
- Mathesar
- Matrix.org
- Mautic
- Mayor's Office of New Urban Mechanics
- MBDyn
- McGill Space Institute
- MDAnalysis
- Measurement Lab
- Media Cloud
- MediaPipe
- Meshery
- MetaBrainz Foundation Inc
- MetaCall
- Metaflow
- Metasploit
- MGGG Redistricting Lab
- Micro Electronics Research Lab - UITU
- Microkernel devroom
- MIT App Inventor
- Mixxx
- MLLAM
- mlpack
- Mobile Robot Programming Toolkit (MRPT)
- ModSecurity
- MoFA Org
- MoganLab
- Moira
- moja global
- Monado
- Mono Project
- Moodle
- MoveIt
- Mozilla
- MuseScore
- mypy
- MZmine
- MZmine and MS-DIAL
N
O
- omegaUp
- Open Bioinformatics Foundation (OBF)
- Open Chemistry
- Open Chromosome Collective
- Open Climate Fix
- Open Data Kit
- Open Detection
- Open Ephys
- Open Food Facts
- Open Genome Informatics
- Open HealthCare Network
- Open Roberta
- Open Robotics
- Open Science Initiative for Perfusion Imaging
- Open Science Labs
- Open States
- Open Technologies Alliance - GFOSS
- Open Transit Software Foundation
- Open3D team
- OpenAFS
- OpenAstronomy
- OpenCensus
- OpenCV
- OpenELIS Global
- OpenEMR
- OpenHMD
- OpenKeychain (OpenPGP for Android)
- OpenMined
- OpenMRS
- OpenMS
- OpenRefine
- OpenSIPS
- OpenStreetMap
- openSUSE Project
- OpenVINO Toolkit
- OpenWISP
- OpnTec
- Oppia Foundation
- Orange – Data Mining Fruitful & Fun
- Orcasound
- Organic Maps
- OSGeo (Open Source Geospatial Foundation)
- OSU Open Source Lab
- Our World In Data
- oVirt
- OW2
- OWASP Foundation
- ownCloud
P
- P2PSP.org
- PAL Robotics
- PEcAn Project
- Peragro
- Percona
- Performance Co-Pilot
- Pharo Consortium
- phpBB Forum Software
- phpMyAdmin
- Physical Web Project
- Pidgin Instant Messenger
- Pitivi
- Plan 9 Foundation
- PLASMA-UMass
- Plone Foundation
- PMD
- Pocket Science Lab
- Point Cloud Library
- Polly Labs
- Polypheny
- Portland State University
- PostgreSQL
- Postman
- PowerDNS
- preCICE
- PRISM Model Checker
- Probot
- Processing Foundation
- Project Mesa
- Project PANOPTES
- Project WikiLoop
- Prometheus-Operator
- Public Lab
- Purr Data
- Python Software Foundation
R
S
- SageMath
- Salesforce
- Samba
- Scala Center
- Scalable Parallel Computing Laboratory
- Scilab
- SCoRe Lab
- ScummVM
- SeaQL
- Seastar
- Semi Technologies
- Shaka Player
- Shogun
- Sigmah
- sktime
- Society for Arts and Technology (SAT)
- Software and Computational Systems Lab at LMU Munich
- Software Heritage
- Soletta Project
- Space @ Virginia Tech
- SPDX
- SQLancer
- St. Jude Children's Research Hospital
- stdlib
- Ste||ar group
- Stemformatics
- Stichting SU2
- Stony Brook University Biomedical Informatics
- strace
- Stratosphere Laboratory, Czech Technical University in Prague
- Streetmix
- Submitty
- Sugar Labs
- SW360
- Swift
- SymbiFlow
- SymPy
- Synfig
- syslog-ng
- Systers Community
- Systers, an Anita Borg Institute community
T
- Tarantool
- TARDIS RT Collaboration
- TARDIS SN
- TEAMMATES @ National University of Singapore
- TensorFlow
- The Apache Software Foundation
- The Center for Connected Learning and Computer-Based Modeling
- The ENIGMA Team
- The FreeBSD Project
- The Honeynet Project
- The JPF team
- The Julia Language
- The Libreswan Project
- The Linux Foundation
- The Mifos Initiative
- The Monarch Initiative
- The NetBSD Foundation
- The ns-3 Network Simulator Project
- The OpenROAD Initiative
- The P4 Language Consortium
- The Palisadoes Foundation
- The Perl Foundation
- The Postgres Operator
- The Qt Project
- The Rust Foundation
- The Terasology Foundation
- The Tor Project
- The Vega Project at the University of Washington
- The Wine Project
- TianoCore
- Tiled
- Timelab Technologies Ltd.
- TimVideos.us
- TLA+
- Tokio
- Tungsten Fabric
- Typelevel
U
W
X