GeoShell is a Windows Shell Replacement. It replaces the standard 'Start Menu', 'Desktop', 'Task Bar' and 'system tray' of windows with a smaller, faster, and more configureable program, with an extensible bar-oriented minimal interface.
Works with Windows 7 Pro (64bit) about as well as it worked under Windows XP Pro and Windows 2000 Pro. It's a bit buggy, but then, it's always been a bit buggy. Part of the charm, as it were. Still not for the faint of heart. If you don't like playing in the registry, this is not the shell replacement for you. That's why I ranked the 'ease' level so low. There is also no support since they stopped development on this in 2005. If one has questions, I'd suggest Google. Just remember that the original website is gone. One will have to search deep archives.