CSS Compressor

I found this the other day. Another nice compressing tool, but this one is for CSS.

http://www.cssdrive.com/index.php/main/csscompressor

Developer tools

I have some development tools I've used day-to-day, you might like them too...

Quickly find and replace stuff (commas to line breaks, regular expressions, etc)
http://www.parkapps.com/tools/find_replace.cfm

Other tools can be found at http://www.parkapps.com/tools/