Explains the photoshop blending modes, but these modes are also used in many video editing programs.

All of them are pretty useful, but the 2 I use the most are "Simple Mask" and "Feathered Crop" I use CS6 and these plugins are absolute game changers. I use one of them in every single vid. Note: these plugins are probably useless to you if you use CC, but technically they should still work with current versions. Also, while they work for AfterEffects, I wouldn't bother installing them there. These are really only best used in Premiere.

For Premiere, After Effects, Vegas Pro, and Nuke. Note: Vegas version is included in a paid plugin called Vegasaur Toolkit. The other versions are free.

Realistic NTSC/VHS effect. Open source. Available as standalone or plugin.

A resource site with downloads & guides, focusing on Adobe After Effects piracy