Apache MINA is a network application framework which helps users develop high performance and high scalability network applications easily. It provides an abstract, event-driven, asynchronous API over various transports such as TCP/IP and UDP/IP via Java NIO. Apache MINA is used in some sucessful open-source servers such as Hyperion and rs2dv. It has proven that it is one of the best networking engines in a RuneScape emulator.
Apache MINA 2.0
Recently MINA 2.0 has been released to the public. Although it does not have a stable release yet, it has proven that MINA can be even faster and better then previous releases.