Marvel Super Heroes
The Marvel Super Heroes remake by SpiDoL is a decent effort developed with the MUGEN game engine, though some text editing is required to get the sound working. Search for the Data folder and change the Sound configuration value in the mugen.cfg file from 0 to 1, in order to enable the sound effects plus some background music. Most of the standard and special moves from the arcade version have been retained, hence veterans should be able to figure out the controls in no time. Some of the new characters are pretty fun to play with as well. Thor is especially impressive, but Carnage is rather cheap and Todd's creation has little powers. A simultaneous team mode also allows all four combatants to slug it out at the same time.