Java decentralized cross-platform network multiplayer game engine
A new decentralized way of network game-design..
Server-client-client-based with object-streaming. Which means that everyone can run a server with almost no hardware costs.
The whole system is built upon a network of trust in within the masterclient delegates tasks.
Cardhouse is an online card game engine that supports a wide variety of games. The client is independent of the card game rules and new games can be added to the server without it having to reboot.
Terra Tenebrae is a free (as freedom) multi-Players RPG game engine based on client/server technology. The assets used are in licenses CC0, CC-by, CC-by-sa or GPL.