Toshiba T7766A, Winbond WF19054, JFC 95101 and File KC89C72 are clones of the PSG. [https://wiki.agiri.ninja/sound_chip_clones:index Source]
Yamaha produced the SSG (Software-controlled Sound Generator) chip family (YM2149F, YM3439, YMZ294, YMZ284, YMZ285) which is a quasi-clone of the PSG. 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.This chip equips the [[Atari ST]] and the [[Aleste 520EX]]. [https://www.cpcwiki.eu/imgs/a/ae/ALESTE_520EX_PCB_Top.jpg Source]
The SSG has also been integrated as a component inside some of the arcade soundchips of the Yamaha OPN family. That's why you can find it in the [[Neo-Geo]] as a component inside the YM2610 soundchip.