Provides a set of Ant tasks suitable for developing MIDP Java applications.

An integrated development environment for the creation and testing of applications that will be deployed on handsets and other small devices. [Commercial]

A set of Java MIDlets that allow developers to quickly learn the specifics of new devices. [Open source, MIT License]

Offers a mobile mapping toolkit to create multi-device compatible mapping applications. Supports OpenStreetMap.org and other map sources, GPS, KML data sources, on-line and offline map content.

Minimizes the size of an application in .jar format, the execution module of J2ME applications, and makes another .jar file that runs in virtually the same way as the original file. [Commercial, trial version]

A toolbox for developing wireless applications including emulation environments, performance optimization and tuning features, documentation, and examples.

For creating advanced embedded solutions, by IBM.