Acqlite is Gnutella file sharing program based on LimeWire, Acquisition and Cabos. It is free software, no spyware, no adware. It provides simple interface, multi languages support, and iTunes + iPod integration.
AFPStatus gives you a very simple icon inside your menu bar that will show you the current status of your file sharing with one look. It will show you if file sharing is enabeled or not and it will list the IP-Addresses of other users currently connected to your Mac.
Bits on Wheels
Bits on Wheels is a native BitTorrent client for the Macintosh. It is completely written in Objective-C and Cocoa.
iSwipe is a Multi-protocol search and download tool. It is compatible with WWW, FTP, Hotline, Napster, OpenNapster, Gnutella, Carracho, OpenFT, iTunes, eDonkey and FastTrack (Kazaa, Grokster), BitTorrent and the Ares networks.
LH-ABC is a multi platform BitTorrent client based on ABC.
p300 is a program that allows you to share directories with other computers on a LAN or VPN. Other hosts running p300 are automatically discovered using IP Multicast.
River helps Mac users to serch (and find!) torrent file.
Schick provides an easy way to send files over an bonjour-enabled network (LAN, not internet).
ShakesPeer is a p2p, or peer to peer file sharing program. It is a client for the Direct Connect protocol. The main goal of ShakesPeer is to create a fully featured client, compatible with DC++, that runs on Mac OS X with a native Aqua GUI. The program is released as Open Source under the GPL License.
SolarSeek is a SoulSeek p2p client for Mac OS X. It uses bindings and Cocoa to give a clean, powerful interface.
Tomato Torrent is a BitTorrent client built on BitTorrent 4.2. It remembers recent downloads, auto-stops torrents when they have seeded a set amount, and sets an upload rate for torrents that start seeding.
Transmission is a free BitTorrent client written from scratch in C.
Valknut is a program the uses the Direct Connect protocol. It is compatible with other DC clients, such as the original DC from Neomodus, DC++ and derivatives. Valknut also interoperates with all common DC hub software.
xMule is a multi-platform clone of the popular eMule client for the eDonkey filesharing network. Currently supporting various Linux/Unix/BSD platforms, it aims at higher stability and portability than the competitors.