https://github.com/Ryochan7/antimicro
antimicro is a graphical program used to map keyboard keys and mouse controls
to a gamepad. This program is useful for playing PC games using a gamepad
that do not have any form of built-in gamepad support. However, you can use
this program to control any desktop application with a gamepad; on Linux,
this means that your system has to be running an X environment in order to
run this program.
This program is currently supported under various Linux distributions,
Windows (Vista and later), and FreeBSD. At the time of writing this,
antimicro works in Windows XP but, since Windows XP is no longer supported,
running the program in Windows XP will not be officially supported. However,
efforts will be made to not intentionally break compatibility with Windows XP.
Also, FreeBSD support will be minimal for now. I don't use BSD on a daily
basis so the main support for FreeBSD is being offered by Anton. He has
graciously made a port of antimicro for FreeBSD that you can find at the
following URL: http://www.freshports.org/x11/antimicro/.