Apps similar to FightCade include GGPO, which is free and open source. Other options are Prototype Emulator. Between them they cover Windows and Linux.
Created in 2009, the GGPO networking SDK pioneered the use of rollback networking in peer-to-peer games. It's designed specifically to hide network latency in fast paced, twitch style games which require very precise inputs and frame perfect execution.
Prototype was created for everyone participate in e-sports tournaments and avoid congesting the rooms of other emulators, and why not ?! play with your friends !! It was created for you, Prototype is yours. Have fun = D
