LimeWire is a free and open source Gnutella peer-to-peer network client released under the GNU General Public License. The program allows users to share files using the Gnutella peer-to-peer protocol. It was the first file sharing program to support firewall-to-firewall file transfers, a feature introduced in version 4.2, which was released in November 2004.
Lime Wire LLC, the developer of LimeWire, distributes two versions of the program; a basic, free version, and an enhanced version sold for a small fee, which is said to offer faster downloads. Prior to April 2004, the free version of LimeWire was distributed with a bundled program called "LimeShop" (a variant of TopMoxie), which was considered by computer security experts to be spyware. With the removal of all bundled software in LimeWire 4.0, these objections were addressed.
