There are 2 repositories under hmd topic.
Open Source Lighthouse Tracking System
Use Steam VR-enabled applications with your phone as HMD (Head-mounted display). The only Open-Source solution to similar commercial packages like VRidge, iVRy, Trinus etc etc.
Chrome DevTools extension to emulate WebVR API
This python script helps you switch your Steam HMD lighthouses V2 on and into stand-by.
DIY VR devices
Modular shader to enhance you HMD clarity & sharpness with minimal performance impact.
Annwvyn C++ Open Source designed-for-VR game engine and application developement framework
Read and manage power states for your Valve Index® Base Stations in Home Assistant.
OpenVR SDK
A tool for PCVR users that creates exe's that launch PCVR games correctly (in VR rather than 2D). Allows Quest users to use many PCVR titles with Virtual Desktop WITHOUT the Oculus app or SteamVR app running, which can greatly improve latency.
SteamVR driver for TrueOpenVR
Omnidirectional Virtual Visual Acuity (OVVA) is a new user-centric VR clarity metric. OVVA measures and compares the virtual visual acuity of the central, focal area of a VR HMD and environments and their degradation in the noncentral areas.
Python implementation of SPAAM (Single point active alignment method) for optical see-through HMD calibration for AR
Static lights - But only in VR or only on Desktop!
PowerControl for LighthouseV2 with SteamVR integration
The Moculus is a Virtual Reality Head-Mounted-Display (HMD) for small experimental animals, which provides a fully immersive experience for head-restrained neurobiological experiments.
A wrapper of OpenHMD that uses GObject to provide language bindings by GObject introspection
Development of a Face Tracking Pipeline for lower face tracking RGB HMCs
BrightView project page
A demo scene to integrate and show a DIY HMD in action using ogre3d