For DOF, the most widely used tool is Frischluft's Lenscare pluginhttp://www.frischluft.com/lenscare/index.php
For flares, there is only one tool to rule them all.http://www.redgiantsoftware.com/product ... ctory-pro/
For CC, AE built in stuff is fine. Alot of People use Magic Bullet stuff, which is fine, but if you know how to use the built in tools, there's not really a need to spend the extra money. And alot of people don't think AE comes with a traditional 3 way CC tool, but indeed it does. Synthetic Aperture's Color Finesse, which ships with AE, has a standard 3 way color corrector. It also has TONS more, if you delve into it.