A

accounting.js

Tiny JavaScript library for number, money and currency formatting

JavaScriptLibrary

Anima.js

Lightweight JavaScript animation library

AnimationJavaScriptLibrary

Annotator

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

JavaScriptLibraryOpen Source

AntTweakBar

C/C++ library to add light and graphical user interface into graphic applications based on OpenGL

GUILibrary

Armadillo

C++ linear algebra library

Library

audiolib.js

Audio tools library for javascript

B

Backbone.js

Lightweight MVP Library for JavaScript

JavaScriptLibrary

Beautiful Soup

Python library designed for quick turnaround projects like screen-scraping

LibraryPython

Behave.js

Lightweight library for adding IDE style behaviors to plain text areas

IDELibrary

Bespoke.js

Super minimal modular presentation library for JavaScript

JavaScriptLibrary

biogo

A bioinformatics library for the Go language

Library

Bokeh

Python interactive visualization library for large datasets that natively uses the latest web technologies

LibraryPython

Bonsai

Lightweight graphics library with SVG renderer to use with JavaScript

JavaScriptLibrary

G1

Boost

C++ Library that adds Data Types, Concurrency, Memory Management and more.

Library

Bourbon

Lightweight mixin library for Sass

Library

Breeze

JavaScript library that helps you manage data in rich client applications

JavaScriptLibrary

Buzz

Lightweight PHP 5.3 library for issuing HTTP requests

LibraryPHP

C

Cairo

2D graphics library written in C

CLibrary

Cesium

JavaScript library for creating 3D globes and 2D maps in a web browser

3D GraphicsJavaScriptLibrary

CGAL

Computational Geometry Algorithms Library written in C++

Library

Chaplin

Architecture for JavaScript applications using the Backbone.js library

JavaScriptLibrary

Clementine

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

AudioLibraryOpen Source

Closure Library

JavaScript library, written specifically to take advantage of the Closure Compiler, based on a modular architecture

JavaScript

ColorJizz

PHP library for manipulating and converting colors

LibraryPHP

Crossfilter

JavaScript library for exploring large multivariate datasets

JavaScriptLibrary

Crypto++

Free C++ class library of cryptographic schemes.

Library

D

D3

JavaScript library for manipulating documents based on data

JavaScriptLibrary

Dataset

JavaScript client-side data transformation and management library

JavaScriptLibrary

deal.II

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

LibraryOpen Source

DirectFB

Hardware graphics acceleration library written in C

CLibrary

E

Eigen

C++ library of template headers for linear algebra, matrix and vector operation

LibraryVector Graphics

F

Fabric.js

Powerful and simple JavaScript HTML5 canvas library

JavaScriptLibrary

Facsimile

High-quality, 3D, discrete-event simulation library written in Java

JavaLibrary

Faker

PHP library that generates fake data for you

LibraryPHP

Fontconfig

Library for configuring and customizing font access

Library

Formance.js

General purpose JavaScript library for formatting and validating form fields

JavaScriptLibrary

FPSMeter

Simple JavaScript library for themable FPS meter

JavaScriptLibrary

freeglut

Free OpenGL Utility Library

Library

FuncJS

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

JavaScriptLibraryOpen Source

G

Gaufrette

PHP5 library that provides a filesystem abstraction layer

LibraryPHP

GDAL

Library for reading and writing raster geospatial data formats

Library

GeSHi

Source code syntax highlighting library written in PHP

LibraryPHP

gif.js

JavaScript GIF encoding library

JavaScriptLibrary

GLEW

C and C++ Library for cross-platform OpenGL feature detection

CLibrary

GLFW

Multi-platform library for creating windows with OpenGL contexts and managing input and events

LibraryWindows

GLib

Cross-platform software utility library written in C.

Library

GLM

OpenGL Mathematics is a header only C++ mathematics library for graphics software

Library

Gloopy

Python library for creating 3D polyhedra and rendering them using OpenGL

3D GraphicsLibraryPython

GNU C Library

GNU Project's implementation of the C standard library

CLibrary

GNU plotutils

C/C++ function library for exporting 2-D vector graphics in many file formats

LibraryVector Graphics

gogeos

Library for Go that provides operations on spatial data and geometric algorithms

Library

groupcache

Caching and cache-filling library for Go

Library

GSAP

Animation Library for JavaScript and ActionScript

ActionScriptAnimationJavaScriptLibrary

GSL

GNU Scientific Library is a software library for numerical computations

Library

gtkmm

Official C++ interface for the popular GUI library GTK+.

GUILibrary

H

Hammer.js

JavaScript library for multi-touch gestures

JavaScriptLibrary

Heatmap.js

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

JavaScriptLibraryOpen Source

Heyoffline.js

JavaScript Library to warn your users when their network goes down

JavaScriptLibrary

Hint.css

Tooltip library in CSS for your lovely websites

Library

HTMLPurifier

Standards-compliant HTML filter library written in PHP

HTMLLibraryPHP

I

ImageWorkshop

PHP class using GD library to work easily with images as layers

LibraryPHP

Imagine

OOP library for image manipulation built in PHP 5.3

LibraryPHPPixel Graphics

Intro.js

JavaScript Library to generate Introductions for websites and features with a step-by-step guide for your projects

JavaScriptLibrary

IVT

Powerful and fast C++ computer vision library

Library

J

Jansson

C library for encoding, decoding and manipulating JSON data

CJSONLibrary

G1

jQuery

Widespread JavaScript Library

JavaScriptLibrary

jQuery.payment

General purpose jQuery library for building credit card forms, validating inputs and formatting numbers

Library

JSLIBRARYBOILERPLATE

An easy boilerplate for rolling your own JavaScript Library written in CoffeeScript, TypeScript and pure JavaScript

JavaScriptLibrary

K

Kivy

Open source Python library for rapid development of applications

LibraryOpen SourcePython

L

Lazy.js

Utility library for JavaScript, similar to Underscore and Lo-Dash with lazy evaluation

Library

Leaflet

Open-Source JavaScript Library for Mobile-Friendly Interactive Maps

JavaScriptLibraryOpen Source

libfixmath

Platform-independent fixed point maths library written in C

CLibrary

libLAS

C/C++ library for reading and writing LAS LiDAR format

Library

libSBML

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

LibraryOpen Source

libsndfile

C library for reading and writing audio files

AudioCLibrary

Lua-httpd

LUA Networking Extension Library

LibraryLua

LWJGL

The Lightweight Java Game Library that poweres Minecraft

JavaLibrary

M

Mapstraction

Javascript library that provides a single, common interface for a wide variety of Javascript map APIs

JavaScriptLibrary

markItUp!

JavaScript plugin built on the jQuery library that turns any textarea into a markup editor

JavaScriptLibrary

Math.js

Extensive math library for JavaScript and Node.js

JavaScriptLibrary

matplotlib

Python 2D plotting library

LibraryPython

Maximilian

C++ Audio and Music DSP Library

middleclass

OOP library for Lua. It has inheritance, metamethods (operators), class variables and weak mixin support

Library

Minified.js

JavaScript library for DOM manipulation, animation, event and requests

JavaScriptLibrary

MLPACK

Machine learning software library for C++

Library

Modernizr

JavaScript library that detects the availability of native implementations for next-generation Web Technologies

JavaScriptLibrary

Modest Maps

Small, extensible, and free library for JavaScript to create interactive maps

JavaScriptLibrary

MOEA Framework

Java library for developing and experimenting with multiobjective evolutionary algorithms

JavaLibrary

Munee

PHP5.3 library JIT compile LESS, SCSS, or CoffeeScript, manipulate images, minify CSS and JS, and cache assets

Library

N

nib

Library for the Stylus CSS language, providing robust cross-browser CSS3 mixins

Library

Numeric.js

Library to perform sophisticated numerical computations in pure javascript

O

Omnipay

Framework agnostic, multi-gateway payment processing library for PHP 5.3+

FrameworkLibraryPHPProcessing

G1

OpenCV

Cross-platform open-source computer vision library

LibraryOpen Source

OpenDAM

Open source digital library and project management software

OpenLayers

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

JavaScriptLibraryOpen Source

OTB

Orfeo Toolbox is a library for remote sensing image processing

LibraryPixel GraphicsProcessing

P

pdf.js

JavaScript library intended to render PDF files using the HTML5 Canvas

JavaScriptLibrary

PHP Excel Reader

PHP Library to read the binary format of XLS files

LibraryPHP

phpgeo

Simple Geo Library for PHP

LibraryPHP

phpThumb()

Uses the GD library to create thumbnails from images (JPEG, PNG, GIF, BMP, etc) on the fly

Library

PhysicsFS

Programming library written in C for virtual file access

CLibrary

PIL

Python Imaging Library adds image processing capabilities to your Python interpreter

LibraryPixel GraphicsProcessingPython

Pillow

More user friendly fork of the Python Imaging Library

LibraryPython

Polymaps

Free JavaScript library for making dynamic, interactive maps

JavaScriptLibrary

PROJ.4

Library for performing conversions between cartographic projections

Library

pybox2d

2D physics library for Python

LibraryPython

pyglet

Cross-platform windowing and multimedia library for Python

LibraryPython

pymunk

Easy-to-use pythonic 2d physics library

Library

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

Raphaƫl

JavaScript Vector Graphics Library

JavaScriptLibraryVector Graphics

Ratchet

PHP library to let developers create real-time, bi-directional apps between clients and servers over WebSockets

LibraryPHP

Recline.js

Library for building data applications in pure Javascript and HTML

HTMLJavaScriptLibrary

Requests

HTTP library, written in Python

Python

Requests for PHP

HTTP request library

Library

Rope

Python refactoring library

LibraryPython

S

Scintilla

Free library that provides text-editing functions written in C++

Library

G1

SDL

Simple DirectMedia Layer is a cross-platform development library written in C

CLibrary

Seed

JavaScript interpreter and a library of the GNOME project

JavaScriptLibrary

Sigma

JavaScript library dedicated to graph drawing

JavaScriptLibrary

Sinatra

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

LibraryOpen SourceRuby

Snap.js

A Library for creating mobile shelfs in JavaScript

JavaScriptLibrary

Snap.svg

JavaScript SVG library

JavaScriptLibrary

Snappy

PHP5 library allowing thumbnail, snapshot or PDF generation from a url or a html page

HTMLLibraryPHP

Socialite v2

JavaScript Library providing social sharing buttons

JavaScriptLibrary

Socket.IO

JavaScript library for realtime web applications, including client and node.js libs

JavaScriptLibrary

SPDY

Library for building clients and servers, in Go

Library

StreamTable.js

JavaScript Library that treams data for tables in the background

JavaScriptLibrary

stroll.js

JavaScript library for CSS3 scroll effects

JavaScriptLibrary

svg.js

Lightweight JavaScript library for manipulating and animating SVG

JavaScriptLibrary

SVGAlib

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

LibraryLinuxOpen Source

T

three.js

JavaScript 3D library with software and WebGL rendering support

3D GraphicsJavaScriptLibrary

TR

JavaScript Library to apply CSS based on the text rasterizer and antialiasing your browser is using

JavaScriptLibrary

U

Ubench

Micro PHP benchmark library

LibraryPHP

Underscore

JavaScript library which provides utility functions for common JavaScript tasks

JavaScriptLibrary

Upload

PHP Library to simplify file validation and uploading

LibraryPHP

URI.js

JavaScript library for working with URLs

JavaScriptLibrary

V

Verify.js

Customizable asynchronous form validation library for JavaScript

JavaScriptLibrary

Video.js

JavaScript and CSS library that makes it easier to work with and build on HTML5 video

JavaScriptLibraryVideo

voix.js

JavaScript library to add voice commands to your sites, apps or games

JavaScriptLibrary

W

Watchdog

Python API library and shell utilities to monitor file system events

LibraryPython

whoops

PHP library that deals with errors and exceptions

LibraryPHP

wxHaskell

Portable and native GUI library for Haskell, built on wxWidgets

GUILibrary

wxPHP

PHP extension that wraps the wxWidgets library

LibraryPHP

wxWidgets

Cross-platform GUI Library written in C++

GUILibrary

X

x264

Free software library for encoding video streams into the H.264/MPEG-4 AVC compression format

LibraryVideo

XForms Toolkit

Graphical user interface toolkit for X based on the X11 Xlib library

GUILibrary

Y

YUI

Another JavaScript RIA library

JavaScriptLibrary

Z

Zebra_Image

Lightweight image manipulation library written in PHP

LibraryPHPPixel Graphics

Zopfli

Open source, zlib-compatible data compression library

Library