Professional will be more serious and can create wonders out of it. Gora Nation's Brushes - Downloadable brushes and a description of how to load them. GrafoManiac - they are very fun to play around with and sometimes you get surprised. Most of the filters have a wide range of adjustments, so the previews are only examples of what can be done. Here's a description of the simple process.
Demo versions are available for download.
Download some custom brush sets for Photoshop and let your imagination run wild. An included readme.txt file will explain how to add them to your Brush Palette. Boris FX - Boris FX 6.0 provides advanced compositing features such as 27 apply modes, motion blur, particles, lighting effects, and displacement mapping. Available for Avid Editing Systems and Adobe After Effects, Composite Suite 2.0 includes indispensable effects tools that no editor or artist should be without. Demo versions are available for download.