If you mean plug-ins in photoshop....
I have Topaz Labs (you got to buy this...or look for a cracked version)
**Vivacity
**Simplify
**Adjust
Photomatix Tone Mapping
L & K's assorted photoshop plug-ins
Mehdi Photoshop Plug-ins
--Tha Above plug-ins, I got by Googling it....and it really helps!
This plug-ins do make wonders, just tweak it & you're done!
Here's some links.....
http://www.mehdiplugins.com/
http://thepluginsite.com/resources/freeps.htm
They're all freebies
See Yah!