Jetserver is a high speed nio socket based multiplayer java game server written using Netty and Mike Rettig's Jetlang.It is specifically tuned for network based multiplayer games and supports TCP and UDP network protocols.
Note New version of Jetserver is called Nadron and is in a new netty 4 branch of this same repo.
JetServer is a java nio based server specifically designed for mutliplayer games. It supports UDP and TCP transports. It usesNetty for high speed network transmission and Jetlang for extremely fast in-vm message passing between player sessions and game rooms. The project also uses spring for its dependency injection. This way, it is highly configurable and you can swap out any part of the server with your own implementations.