RetroArch - RetroArch is a frontend for emulators, game engines and media players.
JoyToKey - JoyToKey enables users to control the keyboard using any USB compatible controller (Dualshock 3, Xbox 360, etc.)
Bottlenose - Bottlenose is a high quality front-end companion app for video game emulators!
Xpadder - Xpadder simulates the keyboard and mouse using your gamepad What does Xpadder let you do?
RetroX - RetroX is an Android application that will help you organize and play your own Retro Games with the...
Pinnacle Game Profiler - Pinnacle Game Profiler enables the use of virtually any game controller (gamepad, joystick, etc.) with any PC game. It's preconfigured for most game titles and controllers. Just download and play.