Audio Galaxy
http://www.audiogalaxy.com/
Search user collections at their own machines and a web based search through user's personal online collections, which resides on the Audio Galaxy servers

eDonkey 2000
http://www.edonkey2000.com/
eDoney 2000 is a multi platform filesharing tool with it's own network.

Aimster
http://www.aimster.com/
Integrates with your AOL Instant Manager and let's you search Napster, Gnutella, AOL and MSN networks for files

Flipr
http://www.flipr.com
FLIPR is peer-to-peer file-sharing software that provides quality digital music files while accurately compensating copyright holders.

MP3 Rage   
http://chaotic.digitalchainsaw.com/ProductPages/MP3Rage.html    
MP3 Rage is the definitive collection of tools for MP3 enthusiasts. You can search for and download thousands of MP3's from the Internet using the Napster(tm) music sharing system and the Gnutella

LimeWire
http://www.limewire.com/
LimeWire is a multi-platform Gnutella client with nice features like auto-connect, browse host, multiple search, upload throttling, connection quality control, library management and sophisticated filtering.

Mactella
http://www.cxc.com/
Mactella is the Mac version of Gnutella, an open-source file-sharing network that allows you to exchange an assortment of file formats with other users.

Hotline
http://www.bigredh.com
Hotline Connect is a suite of two free applications that enables Internet users to communicate and share files and information.

File Rogue
http://www.filerogue.com/
File Rogue allows you to create a personal "Catalogue" of files that you wish to share with other members of the File Rogue Community.

RighteousMP3
http://www.righteousmp3.com/
RighteousMP3 is a napster-like program that pays copyrightholders to compensate them for their downloads and offers statistical information to the record labels, but is completely free for users.

Gnutella
http://gnutella.wego.com
This website is the home of the software based on the original gnutella client by Winamp's Justin Frankel.

SnarfZilla
http://snarfzilla.sourceforge.net/
Snarfzilla is a Napster-like client which operates over Freenet. You can also browse Freenet in an HTML browser, like Fproxy, but securely, without access to the web in the browser.

Macigator
http://macigator.com/home.html
Macigator is a all-in-one music program. It allows you to track public OpenNap servers as well as connect to them with just one click.

Carracho
http://www.carracho.com
Once connected to a server, you can meet new friends in chat rooms, discuss ideas in newsgroups and simultaneously download the latest updates for software without switching between different applications.