mod.io - Cross-platform mod API and SDK for game developers.
Xpadder - Xpadder simulates the keyboard and mouse using your gamepad What does Xpadder let you do?
DS4Windows - DS4Windows is an open-source gamepad input mapper and virtual emulator designed to use and connect your PlayStation controller (DualShock 3/4 and DualSense 5) to a Windows 10 & 11 PC.
reWASD - First and only gamepad mapper to make Xbox Elite paddles separate buttons.
JoyToKey - JoyToKey enables users to control the keyboard using any USB compatible controller (Dualshock 3, Xbox 360, etc.)
Joystick 2 Mouse - Joystick 2 Mouse is a little utility which gives mouse usefulness to associated joysticks and joypads.