O-Mat Series
Great freeware tools for various tasks
Find-O-Mat - Manage and search through abbreviation lists
Learn-O-Mat - Vocabulary trainer for any roman language
Roadmap-O-Mat - Create tree-like roadmaps of any content
Minimize-O-Mat - Hide annoying taskbar items in a tray icon
OpenGL based games
ShootMe - Kill your most hatred applications by firing at them with a rifle