Which program can make crisp, clear images out of those that don't look that great ? I've tried in photoshop, but I'm not getting results I want. Or maybe some photoshop add-on.

I have some digital images, that I'd like them to be more colourful ... like on this page... sorta

http://www.glamourmodelsgonebad.com/

It all looks so artificially nice


Any suggestion