Yamaha produced a derivative SSG (Software-controlled Sound Generator) chip family. This chip equips the [[Atari ST]]. The main difference is that the envelope counter on the PSG has 16 steps. On the SSG it has twice the steps, happening twice as fast.
The SSG has also been integrated as a component inside some of the arcade chips soundchips of the Yamaha OPN family. That's why you can find it in the [[Neo-Geo]] as a component inside the YM2610 soundchip.
The AY-3-8930, used in the Covox Sound Master soundcard on PCs, is a register-compatible evolution of the AY-3-8910: