High Fidelity is described as 'enables everyone - educators, makers, entrepreneurs and enthusiasts - to deploy and interconnect shared VR environments' and is an app in the Photos & Graphics category. There are eight alternatives to High Fidelity for a variety of platforms, including Windows, Oculus Rift, Mac, Linux and Online / Web-based. The best alternative is Second Life, which is free. Other great apps like High Fidelity are Hubs by Mozilla (Free, Open Source), VRChat (Free), Workadventure (Free, Open Source) and Facebook Horizon (Free).
Second Life is a free 3D virtual world where users can socialize, connect and create using free voice and text chat. To access this world you need to use a viewer such as Second Life Viewer (see Second Life Viewer).
Choose an avatar to roam virtual maps reminiscent of classic video games. When you meet other people within that space an WebRTC video connection will be established. Larger gatherings possible with Jitsi Integration.
In Facebook Horizon, not only can you explore the virtual world as it grows and changes, but you can discover all sorts of new things that interest and inspire you. Experience gravity defying, distance spanning, genre bending games of all types.
AltspaceVR is a social VR platform for meeting people from around the world, playing interactive games, and attending free live events. Choose from over 28 activities or attend live events with comedians, DJs, authors, celebrities, and more.