Filters for VirtualDub
Avery Lee's genius in creating one of the best tools for manipulating digital video is only matched by the fact that he makes the source code freely available and extensible - the build I use is fccHandler's MPEG version here. Anyhow - a couple of the pluggins I use a lot are Flaxen's VHS restorer and the DeLogo filter which does a pretty good job of removing station idents.