Qustodio - Free parental control software. Monitor and track your child's online activity. Block dangerous sites and protect kids from online bullying.

LTSP - The Linux Terminal Server Project adds thin-client support to Linux servers.

OurPact - Parental Control for apps and devices

Thinstation - Thinstation is a basic and small, yet very powerful, open source thin client operating system...

FamilyTime - FamilyTime is one of the best parental controlling application and family tracking application and finder at the moment available over the internet.

Nakama - Nakama is an open-source distributed social and realtime server for games and apps.