OpenHMD aims to provide a Free and Open Source API and drivers for immersive technology, such as head mounted displays with built in head tracking.
The project is hosted on github, where the source code, downloads and usage examples are available.
Doxygen documentation can be found here.
IRC channel: #openhmd on freenode
On request, we now accept donations which will be used to develop OpenHMD further and faster. We accept any amount either as fiat (normal money) through paypal or as bitcoins.