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jQuery
[872 users on Ohloh]
Tags: xml programming toolkit web html javascript framework ajax dom css library development xpath
jQuery is a fast, concise, JavaScript library that simplifies how you traverse HTML documents, handle events, perform animations, and add Ajax interactions to your Web pages.

It is not a huge, bloated framework promising the best in AJAX, nor is it just a set of needlessly complex enhancements. jQuery is designed to change the way that you write JavaScript.

"You start with 10 lines of jQuery that would have been 20 lines of tedious DOM JavaScript. By the time you are done it's do...

JUnit
[727 users on Ohloh]
JUnit is a Java testing framework. Since testing is not closely integrated with development, it prevents you from measuring the progress of development. You can't tell when something starts working or when something stops working. Using JUnit you can cheaply and incrementally build a test suite that will help you measure your progress, spot unintended side effects, and focus your development efforts.
Spring Framework
[535 users on Ohloh]
Spring is a lightweight Java/J2EE application framework based on code published in "Expert One-on-One J2EE Design and Development" by Rod Johnson. It includes powerful JavaBeans-based configuration management applying Inversion-of-Control principles, a generic abstraction layer for transaction management allowing for pluggable transaction managers, a JDBC abstraction layer, integration with Hibernate, JDO, Apache OJB, and iBATIS SQL Maps, AOP functionality, and a flexible MVC Web application fra...
Ruby on Rails
[513 users on Ohloh]
Tags: rapid-development framework web mvc ruby rails development active-record rubygem
Ruby on Rails is a full-stack MVC framework for database-backed web applications that's optimized for programmer happiness and sustainable productivity. It lets you write beautiful code by favoring convention over configuration.

From the Ajax in the view, to the request and response in the controller, to the domain model wrapping the database, Rails gives you a pure-Ruby development environment. To go live, all you need to add is a database and a web server.

GTK+
[495 users on Ohloh]
GTK+ is a multi-platform toolkit for creating graphical user interfaces. Offering a complete set of widgets, GTK+ is suitable for projects ranging from small one-off projects to complete application suites.

GTK+ has been designed from the ground up to support a range of languages, not only C/C++. Using GTK+ from languages such as Perl and Python (especially in combination with the Glade GUI builder) provides an effective method of rapid application development.

Drupal (core)
[412 users on Ohloh]
Drupal is an open source content management platform, allowing an individual or a community of users to easily publish, manage and organize a great variety of content on a website.

Equipped with a powerful blend of features, Drupal is able to support community sites, blogs, portals and more.

This is Drupal's core, you can find the contributed modules page at http://ohloh.net/projects/3502.

Prototype Javascript Framework
[410 users on Ohloh]
Tags: dom library web development javascript ajax framework programming toolkit
Prototype is a JavaScript framework that aims to ease development of dynamic web applications. Featuring a unique, easy-to-use toolkit for class-driven development and the nicest Ajax library around, Prototype is quickly becoming the codebase of choice for web application developers everywhere.
Joomla!
[311 users on Ohloh]
Joomla! is one of the most powerful Open Source Content Management Systems on the planet. It is used all over the world for everything from simple websites to complex corporate applications. Joomla! is easy to install, simple to manage, and reliable..
Glib
[278 users on Ohloh]
GLib is the low-level core library that forms the basis of GTK+ and GNOME. It provides data structure handling for C, portability wrappers, and interfaces for such runtime functionality as an event loop, threads, dynamic loading, and an object system.
FUSE
[241 users on Ohloh]
Filesystem in Userspace is a simple interface for userspace programs to export a virtual filesystem to the Linux kernel. It also aims to provide a secure method for non privileged users to create and mount their own filesystem implementations.
Qt
[223 users on Ohloh]
Qt is a cross-platform application and UI framework. Using Qt, you can write applications once and deploy them across many desktop and embedded operating systems without rewriting the source code.
Boost C++ Libraries
[217 users on Ohloh]
Boost was begun by members of the ISO C++ Standard committee Library Working Group to provide free peer-reviewed portable libraries to the C++ community. An additional objective is to establish "existing practice" and provide reference implementations so that the Boost libraries are suitable for eventual standardization.

Components successfully moved into draft ISO Standard C++09 include shared_ptr, regular expressions, function wrappers and binders.

Drupal (contributions)
[179 users on Ohloh]
Drupal is an open source content management platform, allowing an individual or a community of users to easily publish, manage and organize a great variety of content on a website.

Equipped with a powerful blend of features, Drupal is able to support community sites, blogs, portals and more.

This is the contributions repository containing contributed modules, themes, translations and installation profiles. You can find the Drupal core project at http://ohloh.net/projects/3189.

RSpec
[172 users on Ohloh]
RSpec is a BDD tool and a framework which provides programmers with a Domain Specific Language to describe the behaviour of Ruby code with readable, executable examples that guide you in the design process and serve well as both documentation and tests.
Quartz Enterprise Job Scheduler
[166 users on Ohloh]
Quartz is an enterprise-class job scheduler for integration with stand-alone Java applications and full-scale J2EE applications. Advanced features include clustering and participation in container managed transactions. It is highly scalable, very lightweight, and supports very complex scheduling.
PHPUnit
[162 users on Ohloh]
In the last decade, PHP has developed from a niche language for adding dynamic functionality to small websites to a powerful tool making strong inroads into large-scale Web systems. Critical business logic like this needs to work correctly. But how do you ensure that it does? You test it, of course.

To make code testing viable, good tool support is needed. This is where PHPUnit comes into play.

KDElibs (KDE)
[145 users on Ohloh]
The KDE libraries, basis of KDE and used by many open source projects. They are based on Qt, Trolltech's cross-platform toolkit, and run on Linux, BSDs, and other Unices, as well as Microsoft Windows and Mac OS X.

Licensed under GNU LGPL, they may be used by open source and proprietary applications.

WebKit
[139 users on Ohloh]
WebKit is an open source web browser engine. WebKit is also the name of the Mac OS X system framework version of the engine that's used by Safari, Dashboard, Mail, and many other OS X applications. WebKit's HTML and JavaScript code began as a branch of the KHTML and KJS libraries from KDE.
Simple DirectMedia Layer
[136 users on Ohloh]
A cross-platform multimedia library designed to provide low level access to audio, keyboard, mouse, joystick, 3D hardware via OpenGL, and 2D video framebuffer.

SDL supports Linux, Windows, Windows CE, BeOS, MacOS, Mac OS X, FreeBSD, NetBSD, OpenBSD, BSD/OS, Solaris, IRIX, and QNX. The code contains unofficial support for AmigaOS, Dreamcast, Atari, AIX, OSF/Tru64, RISC OS, SymbianOS, and OS/2.

SDL is written in C, but works with C++ natively, and has bindings to several other language...

MooTools
[132 users on Ohloh]
Tags: library development javascript ajax framework dom web ria
MooTools is a compact, modular, Object-Oriented JavaScript framework designed for the intermediate to advanced JavaScript developer. It allows you to write powerful, flexible, and cross-browser code with its elegant, well documented, and coherent API.

MooTools code respects strict standards and doesn't throw any warnings. It's extensively documented and has meaningful variable names: a joy to browse and a snap to understand.