Apache Tommee is not a new product, but a bundle of Tomcat and Apache Java EE projects (OpenEJB, OpenJPA,...) by the Apache OpenEJB team. The lot is certified as a Java EE 6 Web Profile server.
Tommee is pretty lean (24Mb) and can run embedded.
The server bundles a set of components, all Apache gear:
Version 1.0 of Tommee was released on april 30th 2012.