Diffuse is a graphical tool for comparing and merging text files. It can work with many revision control systems as a diff viewer or merge tool. Diffuse is able to compare an arbitrary number of files side-by-side (n-way merge), and gives the user the ability to manually correct line matching and directly edit the files.
Edile is intended to be a basic but useful text editor for system administration and scripting purposes. It's something between a script and an application meant for quickly opening and viewing or editing files from the command line or piped from another process. Edile requires Python and PyGTK, and if you have GTKSourceView, it will use that. It has been tested on XP and Ubuntu.
timekpr will track and control the computer usage of your user accounts. You can limit their daily usage based on a timed access duration and configure periods of day when they can or cannot log in. With this application, administrators can limit account login time duration or account access hours. It has support for GNOME, KDE, and XFCE and uses time and access Linux PAM modules. It is currently limited to Ubuntu only.
StoryText (formerly PyUseCase) is an unconventional GUI testing tool written in Python. It currently has mature support for PyGTK, beta status support for Java Swing, SWT/Eclipse RCP, and Tkinter, and very basic support for wxPython. Instead of recording GUI mechanics directly, it asks the user for descriptive names and hence builds up a "domain language" along with a "UI map file" that translates it into the current GUI layout. Instead of an "assertion" mechanism, it auto-generates a log of the GUI appearance and changes to it, so as to use that as a baseline for text-based testing, using e.g. TextTest. Instead of requiring the tester to add "wait" statements by hand, it includes support for instrumenting code so that "waits" can be recorded.