Cantata is a graphical front-end for the music player daemon, MPD. It provides many tools to view and manage the music collection including:

OpenShot Video Editor is a free, open-source, non-linear video editor. It can create and edit videos and movies using many popular video, audio, and image formats. Create videos for YouTube, Flickr, Vimeo, Metacafe, iPod, Xbox, and many more common formats!

Brewtarget is a calculator for brewing beer. It is a Qt-based program which allows you to create recipes from a database of ingredients. It calculates all the important parameters, helps you with mash temperatures, and just makes the process of recipe formulation much easier.

Avahi is a fully LGPL framework for Multicast DNS Service Discovery. It allows programs to publish and discover services and hosts running on a local network with no specific configuration. For example you can plug into a network and instantly find printers to print to, files to look at and people to talk to.

The Android SDK includes a variety of tools that help you develop mobile applications for the Android platform. The tools are classified into 3 groups: SDK Tools, Platform-tools and Build-tools.

The traceroute utility displays the route used by IP packets on their way to a specified network (or Internet) host. Traceroute displays the IP number and host name (if possible) of the machines along the route taken by the packets. Traceroute is used as a network debugging tool. If you're having network connectivity problems, traceroute will show you where the trouble is coming from along the route.