KegTracker is a GTK+-based MOD editor for Linux distributed under the terms of the GPL. It uses a modified version of the xmp library by Claudio Matsuoka and Hipolito Carraro Jr. KegTracker and can play all music modules supported by xmp, which is just about everything except Impulse Tracker modules. Its graphical interface includes Track Display, Order Display, Instrument and Sample Display, as well as basic controls you'd expect in a tracker. It also features a cool starfield about box by Rasterman.
jUSB contains Java source code for a USB development library with some basic USB tools. It is built on top of the Linux "usbfs" facility. It has both an API (for applications) and an SPI (used by Linux and RMI providers). The API is demonstrated by three bundled utilities or sample applications, and by http://jPhoto.sourceforge.net (for digital camera access).
Kalamaris is a mathematics research framework which is similar to Mathe**tica in some aspects, while offering a new approach to solve mathematical problems and simulate physics models in an easy way. Kalamaris' main features are: Function definition and evaluation, plotting functions in 2D, matrix support, symbolic calculus, symbolic derivatives, solving of systems of differential equations through various numerical methods, data visualization in a 3D viewer, etc.