Not long ago, I got the itch to back up a lot of stuff, among it all the emulation stuff I have. So I made a folder on an external drive and ended up with 13 directories in it. That's 12 different systems, from Atari to N64, plus MAME. Make that 13. Atari includes a computer and the VCS. Actually 14. The Master System and Game Gear are really separate systems, though internally they're basically the same thing, and so use the same emulator.
The last one I ran I think was either VBA-m or ZSNES. I was into a Metroid kick for a while. Also Caslevania, including CoM for GBA and Dracula X RoB on the PC Engine (TG16). Looks like I forgot about the X68000, which has the best arcade ports of its day. There's a Castlevania game for that too, hard as nails. I need to add that stuff to the backup folder.
There's a useful Gamecube emulator out now? Oh, Dolphin? Did that actually progress to a playable state?