A particular strength of the Atari, particularly the Falcon series, has been its abilities to emulate many forms of sound-making electronics, via its Motorola 56001 DSP chip. Here are some examples below.
The CreamSID C64 SID Chip emulator. This was a sensational debut effort from the demo group Cream. They managed to emulate the Commodore 64 SID chip in an easy to use player program, for both the STe and Falcon. The Falcon version even had enhanced features such as surround sound replay.
Note:- It is *partially* CT60 compatible, I think it prefers life with the '060 caches off!
It is happily compatible with just about all forms of accelerated Falcon, even the mighty CT60 series!
The Sentry 303 emulator was an analogue synth emulator for the Falcon. It was one of those things which was much talked about, but never seen, and assumed mythical status. Until this year, when it turned out that it was real, and had got to a semi-completed state before stopping. I don't think that this strictly belongs here, but it is a form of 'emulation' and may be interesting nevertheless.