Webcamoid is a webcam plasmoid for the KDE desktop environment and based on GStreamer. It allows you to take pictures and record videos, and manage multiple webcams with custom controls for each webcam. It also provides some funny effects.
plasma-wateriv is a plasma data engine and plasmoid for the KDE desktop which provides access to recent realtime water data using public Web services provided by the United States Geological Survey.
A fast C++ matrix library with an API similar to Matlab's.
An alternative MogileFS storage daemon implementation.