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268 frameworks

Kajona

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

KDE Frameworks

Implemented in: C++
Licence: GNU Lesser General Public License, version 2.1
Kind: software library, free software

Kiesel

Implemented in: Zig
Licence: MIT License
Appeared: 2023

KJS

Implemented in: C++
Licence: GNU Lesser General Public License, version 2.1
Appeared: 2000

Koajs

Implemented in: JavaScript
Licence: MIT License
Kind: JavaScript framework, free software, JavaScript library

Koishi.js

Implemented in: JavaScript, TypeScript
Licence: MIT License
Appeared: 2020

KonaWiki

Implemented in: PHP
Licence: 2-clause BSD License
Kind: free software, wiki software

Kopi

Implemented in: Java
Licence: GNU General Public License, version 2.0, GNU Lesser General Public License, version 2.1
Kind: GNU package, free software, application framework

KParts

Implemented in: C++
Licence: GNU Lesser General Public License, version 2.1 or later
Kind: software library, free software

KumbiaPHP

Implemented in: PHP
Licence: 3-clause BSD License
Appeared: 2007

Laika

Implemented in: Ruby
Licence: Apache License
Kind: free software, test automation framework

Lektor

Licence: 3-clause BSD License
Kind: content management system, free software, static site generator
Latest version: 3.3.14 (August 7, 2026)

Libav

Implemented in: C, Assembly language
Licence: GNU General Public License, version 2.0 or later, GNU Lesser General Public License, version 2.1 or later
Appeared: 2011

Libdash

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

LibGDX

Implemented in: Java
Licence: Apache Software License 2.0
Appeared: 2014

Linux PAM

Implemented in: C
Licence: 3-clause BSD License, GNU General Public License
Kind: free software

LITIengine

Implemented in: Java
Licence: MIT License
Appeared: 2017

Luanti

Implemented in: Lua, C++
Licence: Creative Commons Attribution-ShareAlike 3.0 Unported, GNU Lesser General Public License, version 2.1 or later
Appeared: 2010

LÖVE

Implemented in: C++
Licence: zlib License
Appeared: 2008

Materialize

Implemented in: JavaScript, Cascading Style Sheets
Licence: Expat license
Kind: free software, CSS framework, JavaScript library

Maverick Framework

Implemented in: Java
Kind: free software
Platform: Java virtual machine

MediaLib

Implemented in: C
Licence: Common Development and Distribution License
Kind: multimedia framework, free software

MediaWiki

Implemented in: JavaScript, PHP
Licence: GNU General Public License, version 2.0 or later
Appeared: 2002

Micronaut

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

MkDocs

Implemented in: Python
Licence: 2-clause BSD License
Kind: free software, static site generator

Moai

Licence: Common Public Attribution License
Kind: game engine, free software
Latest version: 4.0.2 (May 23, 2014)

Mojolicious

Implemented in: Perl
Licence: Artistic License
Kind: web framework, free software

Monaca

Implemented in: JavaScript
Licence: Apache License
Kind: integrated development environment, free software

MonoGame

Implemented in: C, C#, C++
Licence: Microsoft Public License, MIT License
Appeared: 2009

MontageJS

Implemented in: JavaScript
Licence: BSD licenses
Appeared: 2012

MuJS

Licence: ISC license
Kind: software library, free software, JavaScript engine
Developer: Tor Andersson, Artifex Software

MuPDF

Implemented in: C, Java
Licence: GNU Affero General Public License, version 3.0 or later
Appeared: 2004

MyBatis

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

Nebula Device

Implemented in: C++
Kind: game engine, free software
Developer: Nebula Device

Nette Framework

Implemented in: PHP
Licence: BSD licenses, GNU General Public License
Kind: web framework, free software

Netty

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

Newton Game Dynamics

Implemented in: C
Licence: zlib License
Kind: open-source software, middleware, free software, physics engine

Next.js

Implemented in: JavaScript
Licence: MIT License
Appeared: 2016

NUnit

Implemented in: C#
Licence: MIT License
Kind: free software, test automation framework

Ocsigen

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

OctaForge

Licence: 2-clause BSD License
Kind: game engine, free software, game creation system
Based on: Tesseract

Oddmuse

Implemented in: Perl
Licence: GNU General Public License v3.0 or later
Appeared: 2003

Ontop

Implemented in: Java
Licence: Apache Software License 2.0
Kind: semantic web software, server software, free software, ontology-based data access, software

Open Dynamics Engine

Implemented in: C++
Licence: BSD licenses, GNU Lesser General Public License
Appeared: 2001

OpenFL

Implemented in: Haxe
Licence: MIT License
Appeared: 2013

OpenGion

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

OpenHAB

Implemented in: Java
Licence: Eclipse Public License
Kind: IoT framework, free software, home automation

OpenMW

Implemented in: C++
Licence: GNU General Public License, version 3.0
Appeared: 2008

OpenProject

Implemented in: Ruby
Licence: GNU General Public License, version 3.0
Appeared: 2012

OpenRemote

Implemented in: Java
Licence: GNU Affero General Public License, version 3.0 or later
Kind: IoT framework, middleware, free software

OpenTESArena

Implemented in: C++17
Licence: MIT License
Kind: game engine, free software

OpenUI

Implemented in: TypeScript
Licence: MIT License
Appeared: 2026

OpenVZ

Licence: GNU General Public License
Appeared: 2005
Kind: free software, container runtime

OpenXava

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

ORX

Implemented in: C
Licence: zlib License
Kind: game engine, free software

OSGi

Implemented in: Java
Appeared: 2000
Kind: Eclipse Foundation project, standards organization, free software

OVal (Framework)

Implemented in: Java
Licence: Eclipse Public License 2.0
Appeared: 2005

Ovidentia

Implemented in: PHP
Licence: GNU General Public License, version 2.0
Kind: content management system, free software, content management framework

Panda3D

Implemented in: C++, Python
Licence: BSD licenses
Appeared: 2002

Papervision3D

Licence: MIT License
Appeared: 2005
First release: December 2005