The latest in the ever-onward march of awesome:
Scripted Amiga Emulator, which emulates a classic Amiga (of configurable specifications, though including video and audio hardware) entirely in JavaScript. Unlike the
various JavaScript PC and Linux emulators, emulating the Amiga's various coprocessors probably will cause your machine to break a sweat. Running Turrican 2 on it was slow, and had the interestingly hauntological aesthetic effect of the music speeding up and slowing down, like on those battery-operated chip-tune Walkmans that everyone had in the
19A0s.