I like vegas' ClipNotes -- sounds like everyone's favorite student resource, Cliff Notes.
iClip -- suck up to the Apple crowd.
Clipboard Enhancement Utility for Windows -- If Microsoft named it. Make sure you compile six different versions, five of which are guaranteed not to install on whatever Windows you actually use. Include Alpha support.
ClipClop -- Appeal to the equine enthusiast.
Dr.Clip -- Putting "Dr." in front of a name is soooo 80's.
eClips -- Putting "e" in front is soooo 90's, but actually the riff on "eclipse" is kinda cool.
Cliposaurus Maximus -- My personal favorite, but I bet nobody else will like it. *sob*