What is the crowd's opinion of Shapeshifter?

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There is also a software called Shapeshifter. It is free and open-source, and you use [Control+C] and [Control+V] as usual. To access clipboard history, you simply press and hold [Control+V], a menu is shown, use the arrow keys to select an item to paste and release [Control+V].

You can see more alternatives to this software at alternativeto.net.