MUSIC is an open platform for the development of self-adaptive context-aware mobile applications, which includes a runtime environment, development tools and pilots. MUSIC can be deployed on Windows, Linux, Windows Mobile and Android devices.
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.
C.O.R.E. - Common Object Runtime Environment
A foundation for multi-node projects, language independent.
Provides central point for storing/retrieving configuration data for all components of project, centralized logging service, NLS service...
Nano Servlet Engine is a really small-sized HTTP server (with Java Servlets(TM) support in the future). Due to its size (100kb) it's possible to use it on mobile devices with a Javaruntimeenvironment.
JRiva is a J2EE (TM) Runtime Implementation Via Aspectj (www.aspectj.org). This project provides a set of classes and aspects which work together to "mimick" an EJB runtime environment.