IBEN is a tool used for teaching Reduced Ordered Binary Decision Diagrams. It allows the student to work with ROBDDs without learning a complex C or C++ interface to an ROBDD package. One can enter the expressions interactively, and view the result as a graph or ask questions about the ROBDD, such as the number of nodes in the ROBDD.
gstar provides a GTK frontend for "starchart", a program written in 1987 by Alan Paeth. The frontend offers a list of pre-defined areas of the sky to chart, plus controls to customize the chart in several ways. Buttons pop up a given postscript chart in gv, or save it to file. Since Paeth's program is freely distributable the source for starchart (along with data files) has been rolled into the gstar package, making it self-contained.
OpenCalculator is a Java-based calculator program. It can calculate mathematical expressions. It has a module system that makes it very easy to add your own functions. Other features are a graph painter and a tiny programming language designed to make it easy to write small mathematical tools.
The AVR-1 Programmer Utilities for Linux is a set of command line tools designed to program the Atmel AVR series of 8 bit RISC microcontrollers. It was originally written to control the "AVR-1" programmer manufactured by ITU Technologies, but its usefulness has been expanded to include the Atmel STK200 programmer.