Cheat Engine - Cheat Engine is an open source memory scanner/hex editor/debugger for Windows.
Wine - Open Source Software for running Windows applications on other operating systems.
JoyToKey - JoyToKey enables users to control the keyboard using any USB compatible controller (Dualshock 3, Xbox 360, etc.)
Proton - Compatibility tool for Steam Play based on Wine and additional components
Xpadder - Xpadder simulates the keyboard and mouse using your gamepad What does Xpadder let you do?
Padlet - Visual boards for organizing anything.