Java based astronomical logging software which stores it's data in a free and open XML based format (OpenAstronomyLog).
Impression is the flexible and extensible parser of mathematical expressions written in Java. It supports user defined operators, single or multi parameter functions and unlimited number of parameters. It is designed to use with numerical methods.
Automated trading system extracts stock quotes from Forex, MetaTrader and tries to detemine points to open/close orders. Using moving average. Implemented in Java. Future versions will use such cool stuff as data mining and artificial inteligance.
A Java class library - functional and easy-to-use classes for UI and more. You can learn a better way to work with UI trees while learning dotuseful. Open Source under the Apache License - use it with your commercial or non-commercial applications.
jMorse generates audible morse code from input text. jMorse is written in java and can be used via ant, log4j, java logging, or directly in-code.