Yacy is a fully distributed search engine made entirely using a P2P technology. It has over 1.4 billion documents in its index.
How to find the right package of a particular application/command in Ubuntu/Linux.
LiveStreamer is a flash-free command-line tool that lets you play content from live stream websites such as Twitch/Justin.tv.
QuiteRSS is a lightweight desktop RSS reader for Ubuntu/Kubuntu.
Converseen is a simple and easy to use Qt application that allows you to bulk convert your image files to any supported format.