PyMOL is a molecular graphics system targeted at medium to large biomolecules like proteins. It can generate high-quality publication-ready molecular graphics images and animations.

Oregano is a GNOME application for schematic capture and printing of electronic circuits. It can simulate the circuits using Gnucap, ng-spice or Berkeley spice.

System-config-printer is a GUI written in Python using GTK+ to configure a CUPS server. Its primary use is to configure the printing system on the local host, but can also be used to setup a remote printer.

bash completion extends bash's standard completion behavior to achieve complex command lines with just a few keystrokes. This project was conceived to produce programmable completion routines for the most common Linux/UNIX commands, reducing the amount of typing sysadmins and programmers need to do on a daily basis.

Redmine is a flexible project management web application. Written using Ruby on Rails framework, it is cross-platform and cross-database.