Wintendo is a video game console replacement shell for Windows. Wintendo provides a much cleaner interface which lets you choose from and launch games. Recommended for those who use Linux or *BSD for productivity and Windows for games.
Uplink Desktop is a unique Windows shell replacement based on the game Uplink from Introversion. It has many features including a cd player, webbrowser, favorites list, filebrowser, text-to-speech, calculator, and system info subs.