Favelets are links that only contain javascript that manipulate the content of a page or might possibly do other cool things. You can find a good explanation and some other useful favelets at http://tantek.com/favelets/ However, I just created one that should hopefully be pretty useful. This one should insert the link count in Google for results. Yahoo! adds rank numbers into the HTML, but Google, for whatever reason does not. Hopefully this is useful:
Drag this link into your toolbar or favorites.

Please report any problems with this in the comments.