The CMU Midi Toolkit (CMT) is a collection of software for writing interactive MIDI software in C. It includes a number of handy utilities along with an application "shell" that provides timing, scheduling, and MIDI interfaces that are portable across DOS, Mac, SGI, and Amiga platforms.
FlightTrack is a GPS track viewing and downloading software for MacOS X designed with light aviation pilots in mind. Its main functions are downloading tracks from GPS/logger, viewing tracks in 3D over a the terrain rendered in 3D, saving tracks in IGC format, and opening/viewing IGC files created by other software.
GeneWeb is a system for people who want to publish their genealogy data on the Web. It can also be used locally (not connected on the net) as a normal genealogy program. It uses very efficient techniques of relationship and consanguinity computing, speaks several languages, and can run in conjunction with an existing Web server (CGI) or standalone using its own internal server.
CHDecide (formerly known as iDecide) will ask you to estimate how likely you are to succeed with an option, how much it's worth for you and how much it hurts if you fail. It will then compute which option is expected to give the most happiness. The program uses the expected-utility theory to make predictions of which option you should choose. You might think that you don't need a program to make your choices, but research has shown that humans are surprisingly bad at picking the most logical choices.