ADVANCEMame Scale2x (You had to e-mail the creator about generator so that he will add your site to his links that is using this filter.)
HQ3X (As used by ZSnes WIP)
P.S. This isn't spam, just something for you to have a go on your emulator. 'Cause there aren't any Genesis emulators around that are using Video Filter (Except for GENS) and it would be great if Generator is the first to use it.