OpenEmulator, a little-known emulator for the Apple II, has an absolutely fantastic NTSC emulation, done with GPU shaders. I'm in the process of porting it to W

OpenEmulator, a little-known emulator for the Apple II, has an absolutely fantastic NTSC emulation, done with GPU shaders. I'm in the process of porting it to WebGL, so that (a) I and others can actually understand it, and (b) so that others can use it.