What are some alternatives?
When comparing jstest-gtk and FreePIE, you can also consider the following products
DS4Windows - DS4 Tool for Windows
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.
InputMapper - Input Mapper is designed to bridge the gap between the devices you use and the games you play.
reWASD - First and only gamepad mapper to make Xbox Elite paddles separate buttons.
Xpadder - Xpadder simulates the keyboard and mouse using your gamepad What does Xpadder let you do?
wjoy - Nintendo wiimote driver for Mac OS X