MP3 Rocket is a client for the Java platform, which uses the Gnutella network to locate files.
Released under the GNU General Public License, MP3 Rocket is free software. It also encourages the user to pay a fee, which will then give the user access to MP3 Rocket PRO.
The MP3 Rocket software project was started in November 2005 by MP3 Rocket Inc.. MP3 Rocket was created when LimeWire's distributor considered placing "blocking" code, which it was developing in response to RIAA
pressure and the threat of legal action, in light of the U.S. Supreme Court
's decision in MGM Studios, Inc. v. Grokster, Ltd.
The Limewire blocking code, if eventually activated, could block its users from sharing licensed files. MP3 Rocket was first released in December 2005.
Written in the Java programming language, MP3 Rocket is able to run on any computer with Java Virtual Machine installed. Installers are provided for Microsoft Windows and is compatible with Windows 2000, Windows XP, Windows 2003 and Vista.
MP3 Rocket offers the sharing of its library through Digital Audio Access Protocol. As such, when MP3 Rocket is running and configured to allow it, any files shared will be detectable on the local network by DAAP-enabled devices (e.g. iTunes).
Other features include the ability to browse the most popular downloads, publish a rating of personal favorites, the ability to preview files while downloading, and parental controls via built-in keyword filters.