Low-latency, high quality voice chat for gamers
Mumble is an open source, low-latency, high quality voice chat software primarily intended for use while gaming. It includes game linking, so voice from other players comes from the direction of their characters, and has echo cancellation so the sound from your loudspeakers won't be audible to other players.
Animator VCE is a tool for splitting single frames and frame sequences into an animation, synchronizing with audio track, adding special effects and exporting to AVI or GIF.
Fire.fm is your direct access to the extensive music library on Last.fm. Listen to music related to your favorite artist, and discover new artists and music in the process.
KSP is music player for Windows (working on Linux edition). At the moment it is very new and buggy so it contains only basic functinality and should be used only for development purposes.