Vuze (formerly Azureus) is a P2P file sharing client using the bittorrent protocol. Search and download torrent files. Play, convert and transcode videos and music for playing on many devices such as PSP, TiVo, XBox, PS3, iTunes (iPhone, iPod, Apple TV).
Filesharing-Bittorrent p2p client connected to TCP supernode/leaf network and UDP DHT network. Ares features a built-in directshow media player, a powerful library manager, shoutcast radio support and can be used to host p2p Chatrooms.
FileZilla is a cross-platform graphical FTP, FTPS and SFTP client a lot of features, supporting Windows, Linux, Mac OS X and more. FileZilla Server is a reliable FTP server for Windows.
Shareaza is a multi-network peer-to-peer ( P2P ) file-sharing client supporting Gnutella2, Gnutella, eDonkey2000 ( eMule ), HTTP, FTP and BitTorrent protocols. Using C++, MFC and ATL, for Windows.
Pidgin is a GTK+ instant messaging application for Windows and Unix. It supports AIM, ICQ, Jabber/XMPP, MSN, Yahoo!, Bonjour, Gadu-Gadu, IRC, QQ, SILC, SIMPLE and more. See http://pidgin.im/about for more information.
WinSCP is a SFTP client and FTP client for Windows. Its main function is the secure file transfer between a local and a remote computer. It uses Secure Shell (SSH) and supports, in addition to Secure FTP, also legacy SCP protocol.
TortoiseSVN is a Subversion (SVN) client, implemented as a windows shell extension. It's intuitive and easy to use, since it doesn't require the Subversion command line client to run. Simply the coolest Interface to (Sub)Version Control!
Miranda IM is an open source, multi-protocol instant messaging client designed to be very light on system resources, extremely fast and customisable. A powerful plugin-based architecture make Miranda IM one of the most flexible clients on the planet.