Mekajiki, makers of RenderGarden for After Effects, have several helpful free tools that can free-up memory, make it easier to find and launch scripts, quickly extract alpha channels from luminance, and more.
Quickly extract alpha channels from luminance with this Adobe After Effects plugin. Extract light effects such as flares or fire from black backgrounds, or generate alphas for your CG occlusion.
After Effects panel for browsing and launching other scripts.
Mac OSX Command-line tool to force-quit Adobe After Effects and automatically increment and save your project.
Mac OSX Command-line tool to kill all stuck AERendercore processes which may be hogging memory.