DireKtion is a satellite navigation project based on data from OpenStreetMap.org. It aims to provide a free (not just as in beer) satellite navigation solution for any vehicle/person that can carry a Linux device. It is able to calculate a route between any two points on a map, and displays directions for traveling between them.
Veusz is a scientific plotting package, designed to create publication-ready Postscript, PDF, or SVG output. It features an easy to use graphical interface as well as a command line interface and can be scripted or embedded in Python scripts. Graphs are constructed in a modular fashion from separate components. Datasets can be interactively modified or created from within the program.
Networkled is a small system tray utility which gives a graphical indication of the received and transmitted traffic. It relies on the proc file system and more specifically on the existence of the file "/proc/net/dev". It can be used with any system tray that follows the "Free Desktop System Tray Specification" and has a proc file system.