Facebook Horizon is described as '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' and is a Social Network in the Social & Communications category. There are more than 25 alternatives to Facebook Horizon for a variety of platforms, including Windows, Android, Mac, iPhone and iPad. The best alternative is Mozilla Hubs, which is both free and Open Source. Other great apps like Facebook Horizon are Second Life (Freemium), VRChat (Free), OpenSimulator (Free, Open Source) and Manyland (Free).
Imagine a world where anything is possible. Join a game of capture the flag in outer space. Share stories around a campfire while roasting marshmallows, then moments later experience a retro game of bowling with an alien and robot.
Welcome to Manyland, an open universe we invent and live together! In an infinite world of abundance, we create new things by drawing them, build new places, hang out and chat, collect, make music, party, script objects, go on adventures...
Furcadia is the magical world where the animals have learned to speak and walk upon two legs. Create your own customizable avatar and start exploring the friendly online game (MMOG) with rich player-driven content.
Activeworlds hosts a Universe of over 500 3D virtual reality worlds. In these worlds you can choose from a vast array of avatars that fit your personality (or your perceived personality - that's half the fun!).