Javatools that any Java project will find useful. Highlights are a Rogue Wave DBTools.h++ lookalike that makes RDBMS access easy. It includes an SQL parser and generator. An implementation of Cron and Crontab in java. File logging and assert classes.
NecJGui is an antennas design tool, interface for Numerical Electromagnetic Code. It allows easily making NEC input files, and viewing them in 3D. It also contains a version of the simulator, so it's complete IDE for full-wave EM simulation.