VR Builder is an open source toolkit that lets you create VR applications without prior experience. It supports all major VR headsets, has a graphical workflow editor, and offers various integrations. VR Builder Pro (https://u3d.as/3pUD) on the Unity Asset Store is based on this repository and offers additional functionality.

Needle Engine is a web-based runtime for 3D apps. It runs on your machine for development, and can be deployed anywhere. It is flexible, extensible and includes networking and XR - across platforms. Documentation at https://docs.needle.tools

POV-Ray on the web

PLUME is a software toolbox that allows for the exhaustive record of XR behavioral data (including synchronous physiological signals), their offline interactive replay and analysis.

ILLIXR: Illinois Extended Reality Testbed

V-Sekai.xr-grid is a VR interaction tool

GaussianSplat+XR: the Hyper-realistic XR Ikebana Experience

Sources for OpenXR loader, basic API layers, and example code.

An efficient and versatile input system for Unity.

Conformance test suite for OpenXR

Open Brush is the open source, community led evolution of Tilt Brush! Forked from https://github.com/googlevr/tilt-brush

An original mixed-reality musical kitchen app built in Unity (C#), designed with accessibility in mind. Created for MIT Reality Hack 2025. Original art and audio.

XR virtual workspace library for Linux

Ultraleap SDK for Unity.

A lightweight reference API server for the Grapho data science + storytelling toolkit

Open source Godot matrix client and XR collaborative creation tool! (WIP)

Godot 4 wrapper for OpenXR vendors loaders and extensions

GPU-accelerated Augmented Reality for the web.

Stardust XR Reference Server, now blazingly fast in Rust :D