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268 frameworks

Fedify

Implemented in: TypeScript
Licence: MIT License
Kind: open-source software, JavaScript framework, free software, free and open-source software, Fediverse app

FixMyStreet

Licence: Affero General Public License
Appeared: 2012
Kind: free software

Flexible Isometric Free Engine

Licence: GNU Lesser General Public License
Kind: game engine, free software
Latest version: 0.4.0

Flexive

Implemented in: Java
Licence: GNU Lesser General Public License, GNU General Public License
Kind: web framework, free software

FlexWiki

Implemented in: Smalltalk, .NET Framework
Licence: Common Public License
Appeared: 2004

Fossil

Implemented in: C, SQL
Licence: 2-clause BSD License
Appeared: 2006

FreeSpace 2 Source Code Project

Implemented in: C++
Licence: freeware
Appeared: 2002

Frotz

Licence: GNU General Public License, version 2.0 or later
Kind: interactive fiction interpreter, free software
Operating system: cross-platform

FuelPHP

Implemented in: PHP
Licence: MIT License
Kind: web framework, free software

Fulcro

Licence: MIT License
Kind: Clojure library, web framework, free software
Latest version: 3.10.1 (October 31, 2026)

FusionForge

Implemented in: JavaScript, PHP
Licence: GNU General Public License, version 2.0
Appeared: 2009

G'MIC

Implemented in: C++
Licence: CeCILL
Kind: application software, raster graphics editor, free software

Garden Windows

Implemented in: Go
Licence: Apache Software License 2.0
Kind: free software, container runtime

GDevelop

Implemented in: WebAssembly
Licence: MIT License
Appeared: 2008

Geant4

Implemented in: C++
Appeared: 1998
First release: 1998

Geomajas

Implemented in: Java
Licence: GNU Affero General Public License
Kind: web framework, free software

Gitit

Implemented in: Haskell
Licence: GNU General Public License
Kind: free software, wiki software

Gmerlin

Implemented in: C
Licence: GNU General Public License, version 2.0 or later, GNU General Public License v3.0 or later
Appeared: 2001

GNU Artanis

Implemented in: GNU Guile
Licence: GNU General Public License v3.0 or later, GNU Lesser General Public License, version 3.0 or later
Appeared: 2013

GNU FreeDink

Licence: GNU General Public License v3.0 or later
Kind: game engine, GNU package, free software, video game
Based on: Dink Smallwood

GNU Role Playing Game Engine

Implemented in: GNU Guile, C
Licence: GNU General Public License v3.0 or later
Appeared: 2007

GNU Serveez

Implemented in: C
Licence: GNU General Public License v3.0 or later
Appeared: 1999

Goanna

Implemented in: C++
Licence: Mozilla Public License
Appeared: 2016

Godzilla.dev

Implemented in: C++, Python
Licence: Apache Software License 2.0
Kind: free software

Google Test

Implemented in: C++
Licence: 3-clause BSD License
Kind: free software, test automation framework

Google Web Toolkit

Implemented in: JavaScript, Java
Licence: Apache Software License 2.0
Appeared: 2006

Grails

Implemented in: Apache Groovy
Licence: Apache License
Appeared: 2005

Granit

Implemented in: C#
Licence: Apache Software License 2.0
Appeared: 2026

Grilo

Licence: GNU Lesser General Public License, version 2.1
Kind: free software
Latest version: 0.3.14 (October 5, 2021)

GStreamer

Implemented in: C
Licence: GNU Library General Public License, version 2.0 or later
Appeared: 1999

Guardian

Licence: Apache Software License 2.0
Kind: free software, container runtime
Developer: Cloud Foundry Foundation

Guile-sly

Implemented in: GNU Guile
Licence: GNU General Public License v3.0 or later
Kind: game engine, abandonware, free software

GZDoom

Implemented in: C++
Licence: GNU General Public License, version 3.0
Appeared: 2005

Hamlets

Implemented in: Java
Kind: web framework, free software
Used for: web framework

HaxeFlixel

Implemented in: Haxe
Licence: MIT License
Appeared: 2011

Helix

Licence: GNU General Public License
Kind: multimedia framework, free software
Developer: RealNetworks

Hexo

Implemented in: JavaScript
Licence: Expat license
Kind: free software, static site generator, JavaScript library

Hibernate

Implemented in: Java
Licence: GNU Lesser General Public License
Appeared: 2001

Higgins project

Implemented in: C++
Licence: Eclipse Public License
Kind: free software

Hiki

Implemented in: Ruby
Licence: GNU General Public License, version 2.0
Kind: free software, wiki software

Hildon

Implemented in: C
Licence: GNU Lesser General Public License
Kind: free software, application framework

Home Assistant

Implemented in: Python
Licence: Apache Software License 2.0
Appeared: 2013

Hono

Implemented in: TypeScript
Licence: MIT License
Appeared: 2021

HtmlUnit

Implemented in: Java
Licence: Apache License
Kind: free software

Hugo

Implemented in: Go
Licence: Apache Software License 2.0
Appeared: 2013

Id Tech 2

Implemented in: C
Licence: GNU General Public License, version 2.0 or later
Appeared: 1997

Ikiwiki

Implemented in: Perl
Licence: GNU General Public License, version 2.0 or later
Appeared: 2006

Insight Segmentation and Registration Toolkit

Implemented in: C++
Licence: Apache Software License 2.0
Kind: free software

Invenio

Implemented in: Python
Licence: GNU General Public License
Kind: repository software, free software

Ionic

Implemented in: JavaScript, TypeScript
Licence: MIT License
Appeared: 2013

Ioquake3

Implemented in: C
Licence: GNU General Public License, version 2.0
Kind: game engine, free software, source port

Jakarta Cactus

Implemented in: Java
Licence: Apache Software License 2.0
Kind: free software

Jamroom

Implemented in: PHP
Licence: Mozilla Public License
Kind: content management system, web framework, free software

JBoss Seam

Implemented in: Java
Licence: GNU Lesser General Public License
Kind: web framework, free software

Jekyll

Implemented in: Ruby
Licence: MIT License
Appeared: 2008

JerryScript

Implemented in: C99
Licence: Apache Software License 2.0
Kind: open-source software, free software, JavaScript engine

JMonkeyEngine

Implemented in: Java
Licence: BSD licenses, zlib License
Appeared: 2003

JoeQuake

Licence: proprietary license
Appeared: 2006
First release: May 7, 2006

JOONE

Implemented in: Java
Licence: GNU General Public License
Kind: free software

JUnit

Implemented in: Java
Licence: Common Public License
Kind: free software, test automation framework