ev_bell can call external programs when the Linux kernel generates a simple sound event like the bell signal from the console. It looks for sound events on /dev/input/event*, parses them, and calls the external program afterwards. The fields of the event packet can be put inside of the argument string of that program.
jRoller is a rollercoaster simulator. It is intended to be mainly entertaining and not scientific. The track and many physical variables are automatically generated from a number of fulcrums freely placeable. The application does not make use of any 3D acceleration and should run on any decent Java-enabled browser.
Reality is a client for Cyanide. Cyanide is intended to be the most dynamic multi-player online role-playing game ever made. This client uses an isometric perspective to present scenes. It is programmed with Python, pygame (SDL), and OpenGL. Full 3D movement is possible, and the server's code can be exchanged online.
u2nl (u-tunnel, universal tunnel) is a small application that listens on a TCP port and tunnels all connections transparently via an HTTPS proxy (using the CONNECT command) to the Internet. Another host on the Internet is not needed. This only works if the HTTPS proxy allows these CONNECT connections. It can be used to provide a Linux host with full connectivity when everything except the http proxy is blocked by a firewall.