Launchy is a free and open-source muti-platform application launcher.

GNOME Do (often referred to as Do) is a free application launcher for Linux

UMLet is an open-source Java-based UML tool designed for teaching the Unified Modeling Language and for quickly creating UML diagrams.

Jitsi (formerly SIP Communicator) is a free and open source multiplatform voice (VoIP), videoconferencing and instant messaging application.

Terminator is a terminal emulator released under General Public License and is available for GNU/Linux Platform.

UnMHT adds MHT file reading/writing support to Firefox and SeaMonkey.