This site http://www.flamingpear.com/
has plug-ins, some are free to try.
Nat'l Assn. of Photoshop Professionals - http://www.photoshopuser.com/
It is an amazing site, but you must pay. http://www.ultimate-photoshop.com
I will see what other links I have.
I don't measure a man's success by how high he climbs but how high he bounces when he hits bottom.
--General George S. Patton