Please reach us at techtoytinkercompany@gmail.com if you cannot find an answer to your question.
For the handheld devices it is normally odroid/odroid and for A.R.E.S it is aresuser/thera
for Retro Arena it is pigaming/thera and for ROTT it is tinker/tinkerboard
I do not believe emulation was intended to pirate or duplicate the work of others, rather that it was intended for people to back up and preserve their libraries, and have a means to play it long into the future after the hardware has failed.
There is a new tutorials section of this site that aims to answer questions like that, and it is always being added to. If the answer is not there you may look here for handhelds:
Home · christianhaitian/arkos Wiki (github.com)
And for SBCs:
You can use the Facebook or Discord groups, or the Forum link on this site:
https://www.facebook.com/groups/retrogamingonthetinkerboard/
We support 51 devices currently.
I do not write closed source code. Keep that in mind before you contact me please.