Hydrogen is an advanced drum machine for GNU/Linux. It's main goal is to bring professional yet simple and intuitive pattern-based drum programming.

specs provides a BDD framework for the Scala language,

Uzbl is a free and open source minimalist web browser designed for simplicity and adherence to the Unix philosophy. Development started in early 2009. The core component of uzbl is developed in C but other languages are also used, most notably Python. All parts of the uzbl project are released as free software under the GNU GPL version 3....

Tango is a cross-platform open-source software library, written in the D programming language for D programmers. It is structured as a cohesive and comprehensive library for general purpose usage.

Ansible is a radically simple configuration management, deployment, and ad-hoc task execution tool.

It supports a wide variety of distributions, requires no software installed on managed machines, and users can get going in minutes. Extension modules can be written in any language....

Xlib provides a C API for the X Window System protocol, along with numerous utility functions.

Current versions of Xlib provide a compatibility wrapper around the X C Binding (XCB) library. For new projects, particularly toolkits, see the XCB library for the designated replacement....

Arcemu is a World of Warcraft server package. Based on the popular Ascent project it aims to provide players with a gameplay very close or identical to the real thing.

It's a multithreaded C++ application with a relational database as a data storage backend( mysql and postgresql are the only supported ones this time)....

The reference implementation for the freesmartphone.org API.,

Theora is a free and open video compression format from the Xiph.org Foundation. Like all our multimedia technology it can be used to distribute film and video online and on disc without the licensing and royalty fees or vendor lock-in associated with other formats....

The Gallio Automation Platform is an open, extensible, and neutral system for .NET that provides a common object model, runtime services and tools (such as test runners) that may be leveraged by any number of test frameworks.

The Gallio project seeks to foster a rich ecosystem of interoperable testing tools produced by and for the community at large so as to address a far wider range of testing needs than any previous independent testing framework has done before. Unit tests, integration tests, performance tests, and even semi-automated test harnesses should all be able to leverage common facilities where appropriate. Moreover, they should present consistent interfaces to the world so that they can easily be integrated into the systems and processes of the enterprise....