AutoKey is a desktop automation utility for Linux and X11. It allows the automation of virtually any task by responding to typed abbreviations and hotkeys. It offers a full-featured GUI that makes it highly accessible for novices, as well as a scripting interface offering the full flexibility and power of the Python language.

ELKI: "Environment for Developing KDD-Applications Supported by Index-Structures" is a development framework for data mining algorithms written in Java. It includes a large variety of popular data mining algorithms, distance functions and index structures.

A highly configurable graphical IRC client with an MDI interface, built-in scripting language, support for IRC DCC, drag & drop file browsing, and much more. KVIrc uses the KDE widget set, can be extended using its own scripting language, integrates with KDE, and supports custom plugins.

netPanzer is an isometric view real-time tactical game designed for play across the Internet and over LAN systems. One on one games are possible via direct connect or modem.

Ettercap supports active and passive dissection of many protocols (even encrypted ones) and includes many feature for network and host analysis.

This IDE for C/C++ and GNOME/Gtk+ applications has features that enable easy debugging, management of code and GUI design by providing a simple and usable user interface. It also integrates with version control systems like CVS, Git or Subversion.