GNOME Tweak Tool allows the adjustment of several advanced GNOME options that can't be configured in gnome-control-center. This includes things like: * fonts used in user interface elements and titlebar * font hinting and aliasing * alternative user interface themes * changes in window management behaviour * behaviour on laptop lid close * file manager desktop icons * icons in menus and buttons

This is a puzzle game in which components need to be combined into a single circuit: connect all computers to a network server, bring water to the taps and so on.

The Uncomplicated FireWall is a front-end for iptables, to make managing a Netfilter firewall easier. It provides a command line interface with syntax similar to OpenBSD's Packet Filter. It is particularly well-suited as a host-based firewall.

Spydr (pronounced like spider) basically is an FITS image viewer. It can work as a stand-alone application but is best integrated in a Yorick-based data-analysis work-flow (Yorick is an interpreted language specialized in numerical computations and scientific graphics). It includes tools to zoom, produce cuts, histograms, Gaussian/Moffat fits, PSF fits (inc. FWHM and Strehl). Can work on single images, sequences of images or data cubes.

AClock is an analog clock with display of smooth seconds. It stays in the dock. The display is customizable: