Scribbler is a clipboard extension that stores pieces of text, URLs, and file locations. It is a very versatile tool and is a must-have if you do a lot of copy/paste-ing like me ;)
This is the joint-most-useful widget I use! :O
Just one small complaint:
There always has to be one blank entry in the list at the top. Always. No matter what I do :D
Shame, but never mind. It's no great hardship... :/