flexVDI - The Open Full-Stack VDI Solution
LTSP - The Linux Terminal Server Project adds thin-client support to Linux servers.
Inuvika OVD Enterprise - A cost-effective alternative to Citrix or VMware Horizon for virtualized apps and desktops. Requires less infrastructure and fewer Microsoft licenses. Lower your TCO by up to 50%. Easy admin and great user experience.
Thinstation - Thinstation is a basic and small, yet very powerful, open source thin client operating system...
Evolve IP Virtual Desktop - Evolve IP has been enabling businesses to deploy both cloud computing and cloud communications services on a single, unified platform.
Nakama - Nakama is an open-source distributed social and realtime server for games and apps.