It may not be Microsoft Bob, but boy am I happy that I installed Clippy ($0.99 at the Mac App Store) on my Mac. No, Clippy isn't that annoying "It looks like you are writing a letter" implementation from years past, but something far more helpful.
The new Clippy, the better Clippy, the Macintosh Clippy allows your Mac to remember previous pasteboard entries for those always awkward times when you have to copy not one but two or more separate items after another. You can pull items as you need them directly from the menu bar at the top of Finder.
That's brilliant.
Clippy is, at the current time, text only -- so you're not going to be able to store images, sou