Falcon has never made any AC controllers - always been pixels.
The non-LOR AC controllers that I know of are the Lynx Express (now made by Minleon), the Renard series (many, many types).
The Lynx Express is only DMX control. They work perfectly with the DMX generated by xLights
Renard controllers understand two protocols - Renard and DMX. I don't have any but I know many of the original xLights people use them so I'd say they are compatible with xLights.
LOR controllers, except for the very old ones, can use both DMX and the proprietary LOR protocol. They use a different set of pins on their RJ-45 input but are otherwise compatible.