RS-OSGI is a project mainly written in ..., it's free.
osgi in RSPS inspired by Parabolika and his osgi-serv
Those of you who are not familiar with OSGi visit OSGi.org.
The core will be split into several sections, scripting implementations (JRuby, Jython), general networking (e.g. Implementation of JBoss Netty and perhaps also raw NIO, being that the aim of the base is power and portability), then finally various systems like EventManager, TaskManager etc.
The whole idea of this base was built around that of Parabolika and his osgi-serv