SuperWaba is a VM for PDAs. Because of the way it was written, you can use Java to develop programs for it. It supports exceptions, threads, many user interface controls, double and long 64-bit types, grayscale, color, 3D controls, and JNI and Java libraries, among other features.

SuperWaba is an exceptionally portable subset of Java that has been optimised for use on devices with small screens. It is extendable and written under the LGPL open source licence. Development can be done under any JDK supporting Java 1.2 or greater, and it is compatible with development environments such as Eclipse, JBuilder etc.