JumpCut made better
tl;dr: This app works well, and has made some improvements on JumpCut. Definitely worth it.
Yes, its a fork of JumpCut. They openly tell you that in the description. Stop complaining about that. In looking at the SCM history, the submitter has done a bit of work on top of the old JumpCut source code, including support for keeping your clipboard across multiple machines (if you so choose, via DropBox). JumpCuts been abandoned since 2009, so my thanks go to the developer for keeping this alive.
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Flycut (Clipboard manager)