WwwWario

 is a fan-game developer, responsible for creating the Five Nights at Wario's quadriology (a Five Nights at Freddy's fan game series) as well as various Wario fan games.

History
WwwWario created Five Nights at Wario's, a FNAF fan game featuring Super Mario characters. The game was very popular and sequels were made.

List of games
NOTE: List may be incomplete.