Groove Shredder is a Firefox addon, can download songs directly from Grooveshark. After installation, a toolbar button will appear which allows you to easily toggle Groove Shredder on or off.
When enabled, you will be given a file save dialog for every song you start playing on GrooveShark. The default filename is customizable in the preferences.
This is a very early release and should not be treated as a finished product. Feedback and bug reports are welcome and will likely be incorporated into future versions shortly. Once again, the usage is simply enabling the add-on and using Grooveshark normally.

Requirements:
* Firefox

The license of this software is Free, you can free download and free use this browser plug-ins software.