Open uGateway is intended to be an OSGi service framework written in C++ for devices with limited resources, that do not allow the usage of a Java Virtual Machine.
The iChilli mobile J2EE platform provides a J2EE compliant runtime environment for both server and mobile platforms, such as J2ME, MIDP or other CLDC based devices. For example iChilli runs on the PersonalJava enabled Sharp Zaurus and Compaq's iPAQ.