libags_audio is a tree based audio processing library built upon GObject and libags. It allows you to do audio processing supporting LADSPA, DSSI and Lv2 plugin support. Audio data is processed multi-threaded.

The Mobile Robot Programming Toolkit (MRPT) is an extensive, cross-platform, and open source C++ library aimed to help robotics researchers to design and implement algorithms in the fields of Simultaneous Localization and Mapping (SLAM), computer vision, and motion planning (obstacle avoidance).

KSystemStats is a daemon that collects statistics about the running system.

QGIS is a Geographic Information System (GIS) which manages, analyzes and display databases of geographic information.

Gmagick is a php extension to create, modify and obtain meta information of images using the GraphicsMagick API.

Qt is a cross-platform C++ application framework. Qt's primary feature is its rich set of widgets that provide standard GUI functionality.