Guide to Filesharing Methods

General

• WWW - Best Clients: Mozilla FireFox, Microsoft Internet Explorer, Opera
• NewsGroups - Best Clients: NewsLeecher, GrabIt
• IRC - Best Client: mIRC

File Transfer Protocol

• FTP - Best Clients: SmartFTP, CuteFTP, FlashFXP
• Best Web Server: Apache
• Best Personal Server: Serv-U

Central Servers

• CuteMX - Dead
• Scour Exchange - Dead
• Napster - Dead
• AudioGalaxy - Dead
• iMesh (the server network) - Dead
• SoulSeek - Best Client: SoulSeek
• FileTopia - Best Client: FileTopia

Multi-Server

• ED2K - Best Client: eMule
• OpenNap - Best Client: XNap, WinLop
• DirectConnect - Best Client: DC++
• i2hub - Dead

Decentralized Networks - Big Population

• Gnutella - Best Clients: LimeWire, FrostWire, Phex
• FastTrack - Best Client: Kazaa Lite Resurrection
• Ares - Best Client: Ares
• Kad - Best Client: eMule

Medium Population

• WinMX - Best Client: WinMX (officially closed, patch required to function)
• Overnet - Best Client: Dead
• G2 - Best Client: Shareaza
• OpenFT - Best Client: KCeasy
• MP2P - Best Client: Manolito
• iP2P - Best Client Dead

Small Population

• MUTE - Best Clients: MUTE
• Ants - Best Client: Ants
• Zultrax - Best Client: Zultrax
• Sumi - Best Client: Sumi
• Share - Best Client: Share (official site down)
• Rodi - Best Client: Rodi
• Nodezilla - Best Client: Nodezilla
• Entropy - Best Client Entropy
• LionShare - Best Client: LionShare
• iMnet2 - Best Client: iMesh
• Aimni - Best Client: Aimni

Private Networks

• WASTE
• ExoSee
• Peer2Mail
• TribalWeb
• PowerFolder
• FolderShare
• FreeNet

BitTorrent

• Standard Protocol - Best Clients: BitTorrent (Official), µTorrent, Vuze
• Azureus DHT - Best Client: Vuze
• Mainline DHT - Best Clients: BitTorrent (Official), µTorrent, Vuze
• eXeem - Dead
• Anatomic - Best Client: Anatomic
• Broadcast Machine - Best Client: Democracy Player
• Localhost - Best Client: Localhost
  Finding Torrents: TorrentScan.com

Discuss P2P file sharing here