AirReceiver is a software implementation of the AirTunes/RAOP protocol used by iTunes and iOS to stream audio to AirPort Express access points and selected AirTunes-capable receivers.
avt is a collection of command line tools for aviation. They allow you to get METARs, TAFs, sunrise and sunset, and geo info, and decode IATA/ICAO airports, airline codes, aircraft tail codes, and aircraft names.
A combination of Portal and Sokoban.
A Step 7 AWL/STL/PLC simulator.