Sonic Retro - Nexus of Sonic research and engineering on the internet.

X-Cult - Video game research awesome place. Formerly Sonic-Cult, but expanded into other gaming.

Sonicfreak94's sepwich A multi-faceted gaming site, there are forums and topics for lots of sadx related things, such as object layouts.

My SADX development tools topic

The SADX hacking topic

MainMemory

MainMemory's page

Endiri

Endiri's Youtube Channel