Symphony OS 

EyeOS 

Linspire 

Knoppix LivePC 

Haiku OS

OSFree

Yellowsheepriver Municator Inc.

Gobolinux

Open-Source Metaverse Project

Solipsis P2P Virtual World Project

OpenCores

OpenHardware

Free Computers

Project Looking Glass

AllPeers 

Kuartet Desktop