nanopond-1.9i.c Modified version of the Nanopond artificial life system by Adam Ierymenko. Changes include readable instruction mnemonics, location-dependent environment parameters and ability to save images (see changelog inside of the source code for more details).
HighFive 0.7 Gomoku engine, took part in the Gomocup 2014 tournament. You'll need a gomoku GUI to play against it.
Randy - a configurable random number generator for CoreWar constant optimization.
RIES Win32 binary An interesting tool by Robert Munafo. Can be used to find expressions approximating a given constant. See RIES homepage for details.