Well I have lots of projects on the go. For every project you see, there are at least two that never make a release.
I was working on a super-quick Gameboy Advance release, but I just couldn't get the recompiler to work correctly.
Games would play for a few seconds - at great speed
but then it would crash.
Just about everything started and some games would run for longer. I may still revisit that one.
If I had a proper C++ toolchain I would get DOSBOX working for Dingoo A320 Native - it would be really fast!
I started on this but... that had to be put down.
I have a Vectrex emulator but those already exist.
Toyed with the idea of FBA for Dingoo Native as well.
Still going to release Neko Project II which is a PC-9801 emulator. Pretty esoteric but could be a bit of fun.