Frescobaldi is a LilyPond sheet music editor with built-in MIDI player and PDF preview. It aims to be powerful, yet lightweight and easy to use.
Enc2ly is a small tool for dumping musical information contained in an Encore binary file to a Lilypond text one. Encore is a popular music notation program from GVOX which uses a proprietary data format. Lilypond is a great music engraving system.
A personal finance application written in Java.
A low overhead C++ profiler for various platforms.