The Steam Controller no longer needs Steam to get the most from it

Thanks to the addition of SDL support, Linux and Windows users can access the full suite of Steam Controller features in non-Steam games.
GamingOnLinux

Steam Beta brings even more Steam Controller tweaks and a firmware fix for Linux

Valve released the latest Steam Beta, and if you have the new Steam Controller you may want to ensure you've opted into it.
Hosted on MSN

Steam controller restocks get official update from Valve

Over the years, Valve has built up a loyal user base with Steam. There are folks (myself included) who have been using the platform since it debuted, all the way back when it was just an excuse to ...
GamingOnLinux

HID Remapper added support for the new Steam Controller

HID Remapper is a useful open-source programmable adapter for USB input devices, with a recent release adding support for Valve's new Steam Controller.