Microsoft Mixed Reality Toolkit (MRTK) is a powerful open‑source framework for building mixed‑reality experiences. Below is a curated list of 20 alternative VR‑focused SDKs, toolkits, and platforms that developers can use to create immersive virtual‑reality applications across a range of hardware and engines.
Get targeted exposure with custom position pinning and highlighted placement.
Official Unity package that provides a high‑level, component‑based workflow for building VR/AR interactions, locomotion, and UI without writing low‑level XR code.
Built‑in VR template and Blueprint nodes in Unreal Engine that simplify motion‑controller setup, teleportation, and interaction for HTC Vive, Oculus, and Windows Mixed Reality.
Open‑source, community‑driven toolkit for Unity that offers ready‑made locomotion, grab, UI, and physics interactions for a wide range of headsets.
Cross‑platform, royalty‑free API standard managed by the Khronos Group, enabling a single codebase to run on all major VR/AR devices.
Official Godot Engine extensions that add VR support, controller tracking, and interaction nodes for OpenXR‑compatible headsets.
CryEngine’s VR module provides high‑fidelity rendering, physics, and a set of VR‑specific Blueprints for Oculus, HTC Vive, and Windows Mixed Reality.
Web‑based, low‑code platform for building and deploying VR experiences that run directly in browsers via WebGL/WebXR.
Open‑source, WebXR‑enabled social VR platform that lets creators publish immersive rooms without any client‑side installation.
Browser‑native API that enables VR (and AR) experiences directly in JavaScript, supported by Chrome, Edge, and Firefox Reality.
Valve’s Unity integration that abstracts headset and controller input across SteamVR‑compatible devices, with built‑in locomotion utilities.
Official Oculus SDK for Unity and Unreal, offering hand tracking, avatar, and platform services for Rift, Quest, and Quest 2.
HTC’s Wave SDK provides native support for Vive Pro, Vive Cosmos, and Vive Focus series, including hand tracking and eye‑tracking extensions.
Pico’s cross‑platform SDK for Unity/Unreal that enables development for Pico Neo 2, Neo 3, and G2 headsets with controller and hand‑tracking APIs.
Google’s legacy VR SDK for Android, supporting Cardboard and Daydream devices, with Unity and native Android integrations.
Performance‑focused suite of VR rendering technologies (VR SLI, Lens Matched Shading, etc.) that can be integrated into custom engines.
Open source runtime and API that provides low‑level access to SteamVR hardware, usable from C++, C#, and other languages.
JavaScript‑based framework that lets developers create interactive, networked experiences inside AltspaceVR and other Windows Mixed Reality spaces.
Web‑framework built on top of three.js that simplifies creation of VR scenes using HTML‑like markup, fully WebXR‑compatible.
Powerful JavaScript 3D engine with built‑in WebXR support, enabling high‑performance VR experiences in browsers.
Cloud‑based service that lets developers create persistent, cross‑device spatial anchors for VR/AR experiences, complementing any XR SDK.