Here's a SourceForge project I found that is the open source version of Meme:

http://metatopia.sourceforge.net/

http://metatopia.sourceforge.net/Old_Page.html

http://metatopia.sourceforge.net/A_Bit_of_History.html

>A Bit of History

>Though some of the folks associated with this project in the past may not know me, I have been a small part of it since it was first imagined. Marc deGroot and I had a long history.

>The idea for VR and Metatopia was originally devised in a Berkeley attic by Marc and me. Since Marc’s untimely death, the project has lied dormant. After I found out about Marcs death, and the existence of Metatopia I decided that it was high time I took an interest in what was originally my brain child. Yes, my brainchild. I did authorize Marc to pursue the concept with my complete blessing. Now, Grandpa is back in charge. It is in loving memory of a man I knew since I was barely a teenager, a man who first launched my career in computing, a man who was a friend, that I rededicate this project to Marc deGroot.

>Marc’s family has created a web site dedicated to his memory, and seeks to help those suffering with Bipolar and Manic Depressive disorders. I am no stranger to this debilitating disorder and urge you to donate to this fund.

And here is his patent on Meme, which has 45 citations, including Philip Rosedal's Distributed Simulation patent (who made Second Life and High Fidelity):

https://patents.google.com/patent/US6421047B1/en

>Multi-user virtual reality system for simulating a three-dimensional environment

>Abstract: A computer-implemented multi-user virtual reality system that erects a networked virtual world for real time interaction amongst multiple participants. A computer-simulation of an animated world is network-distributed amongst participants, e.g., as a virtual world. The simulation accommodates multiple users whose computers are connected by a communications network. The users' computers need not be the same type of machine. Users can interact with one another and with the objects in the virtual world. The properties of objects in the virtual world, such as form, color, and behavior, are displayed on monitors and can be modified in real time while the simulation is running. Modifications to objects are stored and therefore persist, and can therefore bridge across computer system shutdowns and restarts.