libNUI is a hardware accelerated GUI framework that makes it possible to build rich multi-platform applications based on 3D rendered dynamic layouts. Interfaces are built as a composition of widgets and behaviors, and the framework handles positioning, resizing, anchoring, and texture stretching. Objects are connected with synchronous events and delegates for mono-threaded communication, or asynchronous notifications and message queues are used for multi-threaded applications. It also supports strings (including Unicode), paths, files, data streams, fonts, threads, critical sections, audio buffer rendering, and more....

audacity-extra provides diverse GUI plug ins to customize the open source sound editor Audacity. It includes a vowel-sound target-practice display for language learners and an analog waveform data logger for embedded systems.

This is another library for creating and manipulating graphs. There is simply no other graph library out there which can be handle graphs of the size the author is confronted with efficiently. Whenever possible igraph tries to be also user friendly and portable....

The Eternity Engine strives to carry on the banners of BOOM and MBF by providing a stable, true-to-DOOM experience and extending the power of the editor, while also giving players new, fun features to try out.

BOSixNet -- Build Own IPv6 Network

Project should be useful when you have to administer many computers distributed through different networks and connected via NAT. In most of cases you may just install miredo, gogoc or any other tunnel broker's software and these computers will be available via IPv6 addresses. BOSixNet includes the collection of tools for automatic updating the list of such hosts....

MacSword is a powerful Bible study tool for Mac OS X, supporting features such as services, to access the Bible in any program. It uses the Sword Library to work with bible texts, commentaries, dictionaries.

The TPIE (Templated Portable I/O Environment) library is a tool box providing efficient and convenient tools to ease the implementation of algorithm and data structures on very large sets of data.

The sigrok project aims at creating a portable, cross-platform, Free/Libre/Open-Source signal analysis software suite that supports various device types, such as logic analyzers, MSOs, oscilloscopes, multimeters, LCR meters, sound level meters, thermometers, anemometers, light meters, dataloggers, function generators, power supplies, GPIB interfaces, and more....

Pronounced "awesome"; awe6 is game inverted:

A scalable, flexible and approachable tool to assist in the rapid development of quality games.

Adopting an inversion-of-control entity-component concept awe6 comes with both big ideas and batteries included: assets, inputs, audio, session, scenes and preloading are handled out of the box....

Luabind is a library that helps you create bindings between C++ and Lua. It has the ability to expose functions and classes, written in C++, to Lua. It will also supply the functionality to define classes in lua and let them derive from other lua classes or C++ classes. Lua classes can override virtual functions from their C++ baseclasses. It is written towards Lua 5.x, and does not work with Lua 4....