The OpenPuck project allows the Steam Controller to emulate console controls, among other uses

A work in progress, but a very intriguing one.
Tom's Hardware on MSN

Enthusiast reverse-engineers Steam Controller, creates DIY OpenPuck that works without Steam Input

OpenPuck is custom, open-source firmware that can turn a microcontroller into a DIY Steam Controller puck in minutes. You can ...
Android Authority

Transform your new Steam Controller into a makeshift Steam Deck with this accessory

The Basegrip for Steam Controller lets you mount your phone onto the controller. The accessory is launching on the same day as the Steam Controller, May 4. You can ...
Android

Valve just gave Steam Controller modders the best gift ever

Valve is letting modders have a field day with its new Steam Controller, as the company has just released the CAD files for it. With these files in hand, modders and accessory makers will be able to ...