Video Copilot - Sci-Fi Weapons Experiment
Andrew Kramer demonstrates several types of sci-fi weapon firing techniques in this fun and instructive video.
Video Copilot - Simulated Scopes Tutorial
Video Copilot have released a tutorial on creating simulated scopes in After Effects.
Dark Corner is a plug-in for After Effects that creates Ambient Occlusion and Z-Depth information from images.