0-9

7-Zip

Open source file archiver, or an application used to compress files

Open Source

A

AbiWord

Free and open source software word processor written in C++

Open Source

Amarok

Cross-platform free and open source music player

AudioOpen Source

Amsynth

Open source realtime software synthesizer for Linux

LinuxOpen Source

Annotator

Open-source JavaScript library and tool that can be added to any webpage to make it annotatable

JavaScriptLibraryOpen Source

AOKP

Open source replacement distribution based on the Android mobile operating system

Open Source

Apache Bloodhound

Open source web-based project management and bug tracking system written in Python

Open SourcePython

Apache Hadoop

Open source software framework for storage and large scale processing of data-sets on clusters of commodity hardware

Apache Lenya

Open source content management for Java and XML

Apache OFBiz

Open source enterprise resource planning (ERP) system written in Java

JavaOpen Source

Apache OpenOffice

Open-source office productivity software suite

Open Source

Apache Solr

Fast open source enterprise search platform from the Apache Lucene project

Apache Struts 2

Open source web application framework for developing Java EE web applications

FrameworkJavaOpen Source

Apache Tomcat

Open source software implementation of the Java Servlet and JavaServer Pages

JavaOpen Source

AppFlower

Open source application builder for use in building web-based applications written in PHP

Open SourcePHP

Aptana Studio

Open-source web development IDE written in Java and JavaScript

IDEJavaJavaScriptOpen Source

aTunes

Free and open source audio player with MPlayer as its playback engine

AudioOpen Source

Audacious

Free and open source audio player with a focus on low resource usage

AudioOpen Source

Audacity

Free open source digital audio editor

AudioOpen Source

AWStats

Open source Web analytics reporting tool

Open Source

B

Banshee

Cross-platform open-source media player

Open Source

Batavi

Open source webshop written in PHP

Open SourcePHP

BigFish

Open source ecommerce (ERP) platform written in Java

JavaOpen Source

Blender CAM

Open source solution for artistic CAM and G-Code generation based on Blender

CAMOpen Source

Bluefish

Free and open source advanced text editor

Open Source

BRL-CAD

Cross-platform open source solid modeling system

Open Source

bzip2

Free and open-source file compression program that uses the Burrows–Wheeler algorithm

Open Source

C

CakePHP

Open source web application framework

FrameworkOpen Source

Carrot2

Open source search results clustering engine written in Java

JavaOpen Source

Cherokee

Open-source cross-platform web server

Open Source

Chromium

Open source web browser project from which Google Chrome draws its source code

Open Source

CinePaint

Open source computer program for painting and retouching bitmap frames of films

Open SourcePixel Graphics

ClamAV

Open source antivirus engine designed for detecting Trojans, viruses and malware

Open Source

Clementine

Cross-platform free and open source music player and library organizer

AudioLibraryOpen Source

Cloud9 IDE

Open source web-based cloud integrated development environment for JavaScript

IDEJavaScriptOpen Source

G1

CMake

Cross-platform open-source build system

Open Source

CMS Made Simple

Open source content management system for PHP

Open SourcePHP

CMUSphinx

Open source toolkit for speech recognition

Code::Blocks

Free and open source, cross-platform IDE for C, C++ and Fortran

IDE

CodeIgniter

Open source rapid development web application framework written in PHP

FrameworkOpen SourcePHP

Compass

Open-source CSS Authoring Framework

FrameworkOpen Source

concrete5

Open source content management system written in PHP

Open SourcePHP

Cortado

Open-source cross-browser and cross-platform video playback solution written in Java

JavaOpen SourceVideo

Cotonti

Open source web development framework and content manager written in PHP

FrameworkOpen SourcePHP

CppCMS

Open source web application framework for the C++ programming language

FrameworkOpen Source

CyanogenMod

Open source operating system for smartphones and tablet computers

Open Source

D

deal.II

Open source library to solve partial differential equation written in C++

LibraryOpen Source

Dia

Free and open source general-purpose diagramming software

Open Source

digiKam

Free and open-source image organizer and tag editor written in C++

Open SourcePixel Graphics

Docker

Open-source application container engine

Open Source

dojo

OpenSource modular JavaScript Toolkit

JavaScriptOpen Source

Dolibarr

Open source, free software ERP/CRM package for small and medium companies

Dotclear

Open source PHP blog publishing application

Open SourcePHP

dotCMS

Open source web content management system written in Java

JavaOpen Source

Drupal Commerce

Open source eCommerce software that augments the content management system Drupal

Open Source

E

EGroupware

Free open source groupware software intended for businesses from small to enterprises written in PHP

Open SourcePHP

Enyo

Open-source JavaScript framework for cross-platform Applications

FrameworkJavaScriptOpen Source

eSpeak

Compact open source software speech synthesizer for Linux, Windows, and other platforms

Open Source

Etherpad

Customizable Open Source online editor providing collaborative editing in real-time

Open Source

Exponent CMS

Free, open source, open standards modular enterprise software framework and CMS written in PHP

CMSFrameworkPHP

eZ Publish

Open source enterprise PHP content management system

Open SourcePHP

F

Fat-Free Framework

Open source web application framework for PHP

FrameworkOpen SourcePHP

Firefox

Free and open-source web browser

Open Source

Firefox OS

Linux-based open-source operating system for smartphones and tablet computers

Open Source

FireFTP

Free, open source, cross-platform FTP client for Mozilla Firefox in the form of an add-on

Firestarter

Open source Linux Firewall

LinuxOpen Source

FlashDevelop

Open Source ActionScript and Haxe IDE

ActionScriptIDEOpen Source

FluidSynth

Free open source software synthesizer

Open Source

FreeNAS

Open source software network-attached storage system based on FreeBSD and the ZFS file system

Open Source

FreeTTS

Open source speech synthesis system written entirely in Java

JavaOpen Source

FuelPHP

Open source web application framework written in PHP which implements the HMVC pattern

FrameworkOpen SourcePHP

FuncJS

Open source functions only JavaScript library that aims to speed up web development

JavaScriptLibraryOpen Source

G

GATE

Open source text processor

Open Source

Geeklog

Geeklog is an PHP open source application for managing dynamic web content

Open SourcePHP

GetSimple CMS

Fee and open source website content management system written in PHP

Open SourcePHP

GHC

Open source native code compiler for the programming language Haskell

Open Source

Go

Open source programming language

Open Source

GOCR

Open source OCR

GPAC

Open Source multimedia framework

FrameworkOpen Source

Grails

Open source web application framework that uses the Groovy programming language

FrameworkOpen Source

Graphviz

Open source graph visualization software

Open Source

gretl

Open-source statistical package, mainly for econometrics, written in C

COpen Source

gThumb

Open-source image viewer and organizer

Open SourcePixel Graphics

H

Habari

Open source blog engine written in PHP

Open SourcePHP

Heatmap.js

Open source JavaScript library that can be used for generating realtime heatmaps

JavaScriptLibraryOpen Source

HeeksCNC

Open source CAD/CAM application

Open Source

Horde3

A small open source 3D rendering engine especially for MMOs

3D GraphicsOpen Source

HTCondor

Open-source high-throughput computing software framework for coarse-grained distributed parallelization

FrameworkOpen Source

Hugin

Cross-platform open source panorama photo stitching and HDR merging program

Open SourcePixel Graphics

I

ImpressCMS

Open source CMS for building and maintaining dynamic web sites, written in the PHP

CMSOpen SourcePHP

Islandora

Open source software framework designed to help institutions and organizations and their audiences collaboratively manage

ITK

Open-source framework for the development of image segmentation and image registration programs

FrameworkOpen SourcePixel Graphics

J

Jamroom

Community focused open source software web content management system based on PHP

Open SourcePHP

Jasmine

Open source testing framework for JavaScript

FrameworkJavaScriptOpen Source

JavaScriptMVC

Open-source JavaScript MVC framework

FrameworkJavaScriptOpen Source

Jitsi

Free and open source multiplatform VoIP, videoconferencing and instant messaging application

Open Source

JSBSim

Open source flight dynamics model written in C++

Open Source

Julius

Open source large vocabulary CSR engine

K

KDevelop

Open source IDE for Linux

IDELinuxOpen Source

Kid3

Open-source cross-platform audio tag editor for many audio file formats

AudioOpen Source

Kivy

Open source Python library for rapid development of applications

LibraryOpen SourcePython

KNIME

Open source data analytics, reporting and integration platform

Open Source

L

Laravel

Free, open-source PHP web application framework, intended for development of MVC web applications

Open SourcePHP

Leaflet

Open-Source JavaScript Library for Mobile-Friendly Interactive Maps

JavaScriptLibraryOpen Source

LibreOffice

Free and open source office suite

Open Source

libSBML

Open-source software library that provides an API for the SBML

LibraryOpen Source

Lightspark

Free and open source SWF player written in C and C++

COpen Source

lighttpd

Open-source web server optimized for speed-critical environments

Open Source

LuxRender

Free and open source software rendering system for physically correct image synthesis

Open SourcePixel Graphics

LXDE

Free and open source desktop environment for Unix and other POSIX compliant platforms

Open Source

LyX

Open source document processor based on top of the LaTeX typesetting system

Open Source

M

Magento

Open source e-commerce web application

Open Source

Makehuman

Open source 3D computer graphics application designed for the prototyping of photo realistic humanoid

3D GraphicsOpen SourcePixel Graphics

Mantis

Free and open source, web-based bug tracking system written in PHP

PHP

MediaWiki

Free and open source wiki software, used to power wiki websites such as Wikipedia

Open Source

Mer

Free and open-source software distribution, middleware for Linux-based mobile-oriented operating systems

Open Source

Mesa

Free and open-source libraries that implement OpenGL

Open Source

Meteor

Open source JavaScript web application framework

FrameworkJavaScriptOpen Source

MinGW

Fee and open source development environment for native Microsoft Windows applications

Open SourceWindows

mintty

Free and open source terminal emulator for Cygwin

Open Source

Modelio

Open Source UML tool

Open Source

MODX

Free, open source content management system and web application framework written in PHP

FrameworkOpen SourcePHP

mojoPortal

Open source, cross-platform, CMS for ASP.NET which is written in C#

CMS

G1

mongoDB

OpenSource Document Oriented Database

DatabaseOpen Source

MonoDevelop

Open source integrated development environment for Linux, OS X and Windows

IDEOpen SourceWindows

Mozilla Thunderbird

Free, open source, cross-platform email, news, and chat client

N

Nagare

Open source web application framework for developing web applications in Stackless Python

FrameworkOpen SourcePython

Newton

Open-source integrated solution for real time simulation of physics environments

Open Source

Nginx

Open source reverse proxy server for HTTP, HTTPS, SMTP, POP3, and IMAP protocols

Open Source

NOVIUS OS

PHP Open Source Content Management System

Open SourcePHP

nuxeo

Open Source Content Management Platform

Open Source

Nuxeo

Open source document management, case management and digital asset management

O

ocPortal

Open source content management system written in PHP

Open SourcePHP

OpenCms

Open source content management system written in Java

JavaOpen Source

G1

OpenCV

Cross-platform open-source computer vision library

LibraryOpen Source

OpenDAM

Open source digital library and project management software

OpenERP

Open-source enterprise resource planning software written in Python

Open SourcePython

openFrameworks

Open source toolkit designed for artists and designers written in C++

Open Source

OpenFX

Open-Source 3D modeling, animation and rendering suite

3D GraphicsAnimationOpen Source

OpenJDK

Open-source JDK 7 for most popular Linux distributions

LinuxOpen Source

OpenLayers

OpenLayers is completely free, Open Source JavaScript Library for interactive maps

JavaScriptLibraryOpen Source

OpenLDAP

Free, open source implementation of the Lightweight Directory Access Protocol

Open Source

OpenSceneGraph

Open-source high performance 3D graphics toolkit written in C++

3D GraphicsOpen Source

OpenShot

Free and open-source non-linear video editing software package for Linux, built with Python

Open SourcePythonVideo

OPUS

Open source document management solution

Orchard Project

Free, open source, community-focused content management system written in ASP.NET

P

Pantheios

Open source C/C++ logging API

Open Source

papaya CMS

Open source content management system with XSLT templating written in PHP

Open SourcePHP

Paper.js

Open source vector graphics scripting framework for JavaScript

Papyrus

Open Source UML 2 tool based on Eclipse

Open Source

PDFtk

Open source cross-platform tool for manipulating Portable Document Format

Open Source

PHP-Fusion

Light-weight open-source content management system written in PHP

Open SourcePHP

phpLiteAdmin

Open source tool written in PHP intended to handle the administration of SQLite

Open SourcePHPSQLite

phpMyAdmin

Free and open source tool written in PHP intended to handle the administration of MySQL

MySQLOpen SourcePHP

Phraseanet

Open source solution for digital asset management

Pico

Open source flat file CMS for PHP

CMSOpen SourcePHP

Pimcore

Open source PHP web content management platform for creating and managing web applications

Open SourcePHP

PivotX

Open source Blog CMS written in PHP

CMSOpen SourcePHP

Plone

Free and open source content management system built on top of the Zope application server

Open Source

POCO C++

Collection of open source class libraries for developing network-centric, portable applications in C++

Open Source

PostBooks

Open source accounting and enterprise resource planning business system

Open Source

Postfix

Free and open-source mail transfer agent

Open Source

PrestaShop

Open source e-commerce solution based in PHP

Open SourcePHP

ProcessWire

Open source content management framework build with PHP

FrameworkOpen SourcePHP

ProjectLibre

Open source project management software written in Java

JavaOpen Source

Pylons Framework

Open source Web application framework written in Python

FrameworkOpen SourcePython

PyODE

Open-source Python bindings for The Open Dynamics Engine

Open SourcePython

Pyramid

Open source web framework written in Python based on WSGI

FrameworkOpen SourcePython

Q

QuantLib

A free, open-source library for quantitative finance

LibraryOpen Source

Quod Libet

Cross-platform free and open-source music player, tag editor and library organizer written in Python

AudioLibraryOpen SourcePython

R

Radiant

Ruby open source content management system designed for small teams

Open SourceRuby

Razuna

Open Source digital asset management

DAMOpen Source

Redis

Open source, BSD licensed, advanced key-value store

Linux

Refinery CMS

Open source content management system written in Ruby

Open SourceRuby

Replicant

Free and open source operating system based on the Android mobile platform

Open Source

ResourceSpace

Open source digital asset management software

retina.js

Open source script that makes it easy to serve high-res images to devices with high-res displays

Open Source

Rhino

Open source JavaScript engine written in Java

JavaJavaScriptOpen Source

Roundup

Open source issue or bug tracking system written in Python

Open SourcePython

Ruby

Dynamic, open source programming language

Open Source

S

G1

SciPy

Python-based ecosystem of open-source software for mathematics, science, and engineering

Open Source

Scribus

Open Source Desktop Publishing

Open Source

SilverStripe

Free and open source Content Management System written in PHP

Open SourcePHP

Sinatra

Free and open source software web application library and domain-specific language written in Ruby

LibraryOpen SourceRuby

Sky

Open source database used for flexible, high performance analysis of behavioral data

DatabaseOpen Source

Slackware

Free and open source Linux distribution

LinuxOpen Source

SOGo

Open source collaborative software server with a focus on simplicity and scalability

Open Source

Spree Commerce

Open source e-commerce solution based on Ruby on Rails

Open SourceRuby

SproutCore

JavaScript open-source framework

FrameworkJavaScriptOpen Source

Spyder

Open source cross-platform IDE for scientific programming in the Python language

IDEOpen SourcePython

SQLAlchemy

Open source SQL toolkit and object-relational mapper (ORM) for Python

DatabaseOpen SourcePython

Stripes

Open source Java web application framework based on the MVC pattern

FrameworkJavaOpen Source

SuiteCRM

Free and open source alternative to SugarCRM Professional Edition

Open Source

SVGAlib

SVGAlib is an open-source low-level graphics library which runs on Linux and FreeBSD

LibraryLinuxOpen Source

Sylpheed

Open source e-mail client and news client

Open Source

Synfig Studio

Free and open-source 2D animation software

AnimationOpen Source

T

Tesseract

Accurate open source OCR engine

Textpattern

Open source content management system build on PHP

Open SourcePHP

thttpd

Open source software web server

Open Source

Tiki

Open source wiki-based, content management system and Online office suite written primarily in PHP

Open SourcePHP

Tk

Open source, cross-platform widget toolkit written in C

C

Torque 3D

Open source 3D Engine that supports Windows and Browser-based web deployment out of the box. Featuring Oculus Rift support.

G1

TYPO3

They call it the Enterprise Open Source CMS, it is written in PHP

Open SourcePHP

TYPO3 Flow

Open source web application framework written in PHP

FrameworkOpen SourcePHP

U

Umbraco

Open source content management system written in C#

Open Source

V

G1

V8

JavaScript Engine is an open source JavaScript engine developed by Google

JavaScriptOpen Source

VirtueMart

Open source e-commerce solution designed as an extension of the Mambo or Joomla!

Open Source

W

w3m

Free software/open source text-based web browser

web2py

Open source web application framework written in the Python

FrameworkOpen SourcePython

webERP

Open source ERP system for Small and Medium-sized Enterprise

Open Source

Wiring

Wiring is an open-source programming framework for microcontrollers

FrameworkOpen Source

WooCommerce

Open source e-commerce plugin for WordPress written in PHP

Open SourcePHP

Wt

Open source widget-centric web application framework for C++

FrameworkOpen Source

wxFormBuilder

Open source GUI designer application for wxWidgets toolkit

GUIOpen Source

X

Xfig

Free and open source vector graphics editor

Open SourceVector Graphics

XOOPS

Free open source content management systems, written in PHP

Open SourcePHP

Xpdf

Open-source PDF viewer for the X Window System and Motif

Open Source

Y

YafaRay

Free open-source raytracing engine

Open Source

Z

ZenTrack

Open source bug tracking system written in PHP

Open SourcePHP

Zikula

Open source web application framework for PHP

FrameworkOpen SourcePHP

Zopfli

Open source, zlib-compatible data compression library

Library

ZynAddSubFX

Free open source software synthesizer for Linux, Mac OS X and Microsoft Windows

Open SourceWindows