I missed out on iClip during its initial heyday a few years ago, so I was pleased to see it make a comeback. The OS X utility keeps a copy of almost anything that can be sent to the clipboard. It'll also organize those into scrapbooks or however you want.
iClip sits off to the right side of the screen and acts like OS X's dock. It's normally hidden by default, and the preference options are robust and allows you to customize how big the iClip dock is and where on the screen it is. If you have a second display hooked up, you also can set iClip up to be used just on the main display.
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