AMuleW
AMule

aMule is a free peer-to-peer file sharing utility that works with the EDonkey network and the Kad network, offering similar features to eMule and adding others such as GeoIP. On August 18, 2003 it was forked from the xMule source code, which itself is a fork of the lMule project, which was the first attempt to bring the eMule client to Linux. These projects were discontinued and aMule is the resulting project, though aMule has less and less resemblance to the client that sired it.

DC++W
DC++

DC++ is a free and open-source, peer-to-peer file-sharing client that can be used for connecting to the Direct Connect network or to the ADC protocol. It is developed primarily by Jacek Sieka, nicknamed arnetheduck.

EMuleW
EMule

eMule is a free peer-to-peer file sharing application for Microsoft Windows. Started in May 2002 as an alternative to eDonkey2000, eMule now connects to both the eDonkey network and the Kad network. Often used by clients looking for extremely rare content, the distinguishing features of eMule are the direct exchange of sources between client nodes, fast recovery of corrupted downloads, and the use of a credit system to reward frequent uploaders. Furthermore, eMule transmits data in zlib-compressed form to save bandwidth.

FreenetW
Freenet

Freenet is a peer-to-peer platform for censorship-resistant, anonymous communication. It uses a decentralized distributed data store to keep and deliver information, and has a suite of free software for publishing and communicating on the Web without fear of censorship. Both Freenet and some of its associated tools were originally designed by Ian Clarke, who defined Freenet's goal as providing freedom of speech on the Internet with strong anonymity protection.

FrostWireW
FrostWire

FrostWire is a free and open-source BitTorrent client first released in September 2004, as a fork of LimeWire. It was initially very similar to LimeWire in appearance and functionality, but over time developers added more features, including support for the BitTorrent protocol. In version 5, support for the Gnutella network was dropped entirely, and FrostWire became a BitTorrent-only client.

GNUnetW
GNUnet

GNUnet is a software framework for decentralized, peer-to-peer networking and an official GNU package. The framework offers link encryption, peer discovery, resource allocation, communication over many transports and various basic peer-to-peer algorithms for routing, multicast and network size estimation.

Gtk-gnutellaW
Gtk-gnutella

gtk-gnutella is a peer-to-peer file sharing application which runs on the gnutella network. gtk-gnutella uses the GTK+ toolkit for its graphical user interface. Released under the GNU General Public License, gtk-gnutella is free software.

IFolderW
IFolder

iFolder is an open-source application, developed by Novell, Inc., intended to allow cross-platform file sharing across computer networks.

IMuleW
IMule

iMule is a free and open-source anonymous P2P file sharing utility which connects through the anonymous I2P network and the Kad network.

JMuleW
JMule

JMule is an open source file sharing client written in Java for eDonkey2000 networks. JMule is released under the terms of the GNU General Public License, it is based on Java platform and requires at least Java SE 6.0 for operation. At a more general level this is a project that try to accomplish several goals. For now the client has Swing and SWT user interfaces, but more user interfaces were to come soon as of 2010. The name "JMule" comes from a "J" (Java) and a "Mule".

KMLDonkeyW
KMLDonkey

KMLDonkey is a graphical frontend for MLDonkey, a powerful P2P file sharing tool, designed for the KDE desktop.

Marabunta (software)W
Marabunta (software)

Marabunta is a fully distributed software application for anonymous P2P. The main goal is the fight against internet censorship and assuring the freedom of speech. It is a peer-to-peer platform for information exchange among nodes in an anonymous way based on several communication algorithms called "Order and Chaos" which can be found in massive social organizations such as ant colonies.

PhexW
Phex

Phex is a peer-to-peer file sharing client for the gnutella network, released under the terms of the GNU General Public License, so Phex is free software. Phex is based on Java SE 5.0 or later.

QBittorrentW
QBittorrent

qBittorrent is a cross-platform free and open-source BitTorrent client.

RcloneW
Rclone

Rclone is an open source, multi threaded, command line computer program to manage or migrate content on cloud and other high latency storage. Its capabilities include sync, transfer, crypt, cache, union, compress and mount. The rclone website lists supported backends including S3, and Google Drive.

RetroshareW
Retroshare

Retroshare is a free and open-source peer-to-peer communication and file sharing app based on a friend-to-friend network built on GNU Privacy Guard (GPG). Optionally, peers may communicate certificates and IP addresses to and from their friends.

ShareazaW
Shareaza

Shareaza is a peer-to-peer file sharing client running under Microsoft Windows which supports the gnutella, Gnutella2 (G2), eDonkey, BitTorrent, FTP, HTTP and HTTPS network protocols and handles magnet links, ed2k links, and the now deprecated gnutella and Piolet links. It is available in 30 languages.

StealthNetW
StealthNet

StealthNet is an anonymous P2P file sharing software based on the original RShare client, and has been enhanced. It was first named 'RShare CE'. It use the same network and protocols as RShare.

SyncthingW
Syncthing

Syncthing is a free, open-source peer-to-peer file synchronization application available for Windows, macOS, Linux, Android, Solaris, Darwin, and BSD. It can sync files between devices on a local network, or between remote devices over the Internet. Data security and data safety are built into the design of the software.

TriblerW
Tribler

Tribler is an open source decentralized BitTorrent client which allows anonymous peer-to-peer by default. Tribler is based on the BitTorrent protocol and uses an overlay network for content searching. Due to this overlay network, Tribler does not require an external website or indexing service to discover content. The user interface of Tribler is very basic and focused on ease of use instead of diversity of features. Tribler is available for Linux, Windows, and OS X.

Virtuoso Universal ServerW
Virtuoso Universal Server

Virtuoso Universal Server is a middleware and database engine hybrid that combines the functionality of a traditional relational database management system (RDBMS), object–relational database (ORDBMS), virtual database, RDF, XML, free-text, web application server and file server functionality in a single system. Rather than have dedicated servers for each of the aforementioned functionality realms, Virtuoso is an "universal server"; it enables a single multithreaded server process that implements multiple protocols. The free and open source edition of Virtuoso Universal Server is also known as OpenLink Virtuoso. The software has been developed by OpenLink Software with Kingsley Uyi Idehen and Orri Erling as the chief software architects.

WireShareW
WireShare

WireShare is a resurrected version of the LimeWire software. The original LimeWire Pirate Edition was adapted from LimeWire Basic edition to provide similar features to LimeWire Pro, with no adware, advertising, or backdoor control. The Ask toolbar integration was removed, along with dependencies to LimeWire servers and remote settings. The software supports Windows, Linux and Mac, and its source code is available on GitHub.

XMuleW
XMule

xMule is a discontinued free client for the eDonkey peer-to-peer file sharing network intended to bring it to virtually all the major Unix platforms, with a particular emphasis on Linux.