wjoy - Nintendo wiimote driver for Mac OS X
Xpadder - Xpadder simulates the keyboard and mouse using your gamepad What does Xpadder let you do?
Joystick 2 Mouse - Joystick 2 Mouse is a little utility which gives mouse usefulness to associated joysticks and joypads.
FreePIE - programmable input emulator. python based scripting language.
AntiMicro - A tool for mapping keyboard and mouse events to gamepads and joysticks.
reWASD - First and only gamepad mapper to make Xbox Elite paddles separate buttons.