Virtual Photographer (highly reccommended)
Photo-Plugins (great set of plugins for the digital photographer)
Cybia Plugins
Richard Rosemen’s plugins
DragonFly
Flaming Pear free plugins
Redfield Photoshop Plugins
Noiseware Community edition (scroll to the bottom of the page)
Mehdi Plugins (26 free plugins)
3D Shadow By Locas Software
VanDerLee plugins
Harry’s Filters (over 50 free filters)
Simple Filters
HotPixel and BleachBypass by Red Paw Media
Brightness Editor by PowerRetouche
Luce by Antonio Perricone
Xpose, Thredgeholder and Chalkaholic by LittleInkPot
Rolls and Curls by Econym
Flatten and Multifill by BPelt
Paint Machine
Reindeer Graphics free plugins
Graham White’s Filters
Xero Plugins
AAA filters
Filter Factory
Mezzoforce Ice
Unplugged Filters
Murakuma Filters
Neology filters
This is just a simple listing, no details about each of these plugins are posted here, however I will add descriptions and mini reviews in individual posts (at least for the plugins I consider are worth downloading and using)