GrooveOff is an unofficial client for grooveshark.com.
Using it, it is possible to search grooveshark.com's huge database
(thanks to its public API) for artists, songs and albums and save them
on disk for offline playing.

GrooveOff provides some easy to use filters based on artists and albums.
Also included is a minimal player for previewing and listening to songs,
so one will be able to decide whether to keep or reject them.
The application is based on the Qt toolkit, but should feel native in
all desktop environments.