Nodyn is also open source with an Apache licence and a product of the Project:odd team at Red Hat. It isn't a port of node.js but a complete re-write making use of the vert.x application platform.
At the moment only a relatively small part of the node.js API has been implemented - the all important HTTP, UDP, URL, Utilities, Timers,Stdio and so on have been completed. But work is yet to start on arguably as important modules such as HTTPS. It is early days. but I doubt you could just take your existing node.js application and run it under DynJS.
The approach to the conversion is:
Essentially most of the work seems to be refactoring the C dependencies of node.js.
How influential will Nodyn be?