InputMapper!

AntiMicro is a program used to map keyboard and mouse actions to gamepad/joystick buttons. It is useful for playing games with poor or no gamepad support.

JoyToKey enables you to control any softwares (e.g. browsers, games on the web, Microsoft office applications or even Windows itself) by using your favorite windows joystick! Whenever you press joystick buttons and sticks, JoyToKey will convert the input into keyboard strokes and mouse movements so that the target application works as you pre-configured!

Xpadder simulates the keyboard and mouse using your gamepad

Pinnacle Game Profiler allows you to emulate your keyboard and mouse with your video game controller, and otherwise customize the controller's behavior. Many PC games do not directly support game controllers, but with Pinnacle Game Profiler you can use any controller to play any game! Games that use awkward keyboard/mouse control systems can now be played with your favorite gamepad! Compatible with Xbox360, WiiMote, PS2/PS3, and PC Controllers!

Full list of Features

ScpToolkit - Windows Driver and XInput Wrapper for Sony DualShock 3/4 Controllers

jstest-gtk is a simple joystick tester based on Gtk+. It provides you with a list of attached joysticks, a way to display which buttons and axis are pressed, a way to remap axis and buttons and a way to calibrate your joystick.

Put mouse, media and keyboard control in the palms of your hands so you'll never have to leave the couch again!

ControllerMate is a controller programming tool that allows you to customize the behavior of your HID devices — keyboards, keypads, mice, trackballs, joysticks, gamepads, throttles, among others. ControllerMate’s philosophy is to be as flexible as possible, to provide a set of basic programming tools, and to allow the user to combine those tools in an endless variety of ways.

Joystick Mapper is an Mac OS X application that allows you pro play any game or use any other application with a Gamepad or Joystick, even the ones without built-in support.

reWASD is a gamepad mapper that lets you remap Xbox One, Elite and 360 controller to keyboard and mouse. The main unique thing about it is about Xbox Elite paddles: only reWASD allows working with them as with separate buttons. Also, the app allows map Xbox controls to keyboard keys, mouse buttons, moves and scrolls; and to Xbox controls back.

Joystick to mouse (also known as joy2mouse) let's you control the mouse and keyboard using your joystick or gamepad.

Control your PC using an Xbox controller instead of the mouse and keyboard

FreePIE (Programmable Input Emulator) is a C# utility for bridging and emulating input devices. It has applications primarily in video gaming but can also be used for VR interaction, remote control, and other applications. A typical application might be controlling the mouse in a PC game using a Wiimote. Device control schemes are customized for specific applications by executing scripts from the FreePIE GUI. The script language is based on the Python syntax and offers non-programmers an easy way to interface devices. »

An input mapper app that add xinput to Xiaomi Mi Gamepads, so windows games recognize Xiaomi gmepad as a x360 controller & you can play them without any difficulty.