BA has a list of free agents who would require compensation of signed...
Some of the more surprising "Type A" free agents include Brad Ausmus, Rondell White, Bobby Howry, Octavio Dotel, Mark Grudzelanik, Jeff Conine and Scott Eyre (who, of course, has been signed by the Cubs).
"Type B" free agents you wouldn't expect include Dan Miceli, Russ Springer, Brett Tomko, Todd Greene, Rich Aurilia, Rick Helling, Elmer Dessens, and Cal Eldred.
I didn't realize Cal Eldred was still pitching.