Current Resources

I haven’t done anything with ROM hacking since the earliest Nightmare Modules, and I’m trying to find out what people still use for hacking. The trouble is, when I look for resources I have no idea what is still used and what is obsolete. I’m only interested in hacking Jugdral and the GBA games, but if somebody could point me to the necessary up-tp-date resources.

GBA:FEBuilder and Buildfiles
Snes:Buildfiles(Alternatively hexeditor, no FE game is currently as advanced hackingwise as GBA games.)

Thank you.