I run tm3 on
www.4pics.com
ucj on
www.eightseconds.com
Both run Comus Thumbs
I've heard that Thumb Manager is good, and Mad Thumbs is good too.
Rumor mill says Arrow Extreme is good but I can't comment since i haven't bought a copy (maybe the owners wants to hook me up witha temp version to run for a month or 3 so i can review it)