yEd is a powerful graph editor that is written entirely in the Java programming language. It can be used to quickly generate drawings and apply automatic layouts to all kinds of diagrams and networks.
Chess for mobile OS Android, it is possible to play online on FICS, tha largest chess server, or offline against a chess engine with difficulty setting.
The Robust Audio Tool (RAT) is a an open-source audio conferencing and streaming application that allows users to particpate in audio conferences over the internet. These can be between two participants directly, or between a group of participants on a common multicast group.
The purpose of the HardDrake project is to make the hardware configuration easier in Linux, by providing hardware detection and a nice graphical interface. It allows ethernet and sound card configuration, and the hardware auto-detection uses the `detect' library.