CocoaDialog is an OS X application that allows the use of common GUI controls such as file selectors, text input, progress bars, yes/no confirmations and more with a command-line application. It requires no knowledge of Cocoa, and is ideal for creating frontends to shell and Perl scripts (or Ruby, or Python, or... etc).
MultiMode Cocoa allows your Mac to decode and transmit several different modes of non-voice communication often heard on shortwave and ham radio.
Simple utility to access invisible files in several ways: Show/hide invisible files in the Finder Open invisible files from navigation dialog Delete..
Video poker game for Mac OS X. The game is simple to play.
Very intuitive program to play and compose music live for Mac OS X
Cocoa File Management application for Mac OS.