CoffeeMud is a text-based virtual reality game engine (a MUD). It is a mature, full-featured Java codebase. It includes web (HTTP) and email (SMTP) servers, chat (IMC2 and I3) and web clients, and supports ANSI, MXP, and MSP.
VR Juggler is a virtual platform for virtual reality application development created at the Virtual Reality Applications Center at Iowa State University. Applications developed in VR Juggler can transparently move between a wide range of VR systems.
VRS is an environment for presenting three dimensional (3D) world. All visualisations are made at client(s) side VRC (Virtual Reality Client - example client is under developement, SF site avaible, see also http://jvrc.info).
Ecwid is a hosted cloud commerce platform used by over 1.5 million merchants and offers the easiest way to add an online store to any website, social site or multiple sites simultaneously.
Your free online store is just a few clicks away.
Set up your Ecwid store once to easily sync and sell across a website, social media, marketplaces like Amazon, and live in-person. Get started with one, or try them all.
VRMoo can be summed up as such: Virtual Reality Object Oriented MUD. I intend VRMoo to be capable of simulating complex environments, allowing real time 3D interaction with these environments, and allowing real time 3D interaction with other users.