BitComet is a powerful, clean, fast, and easy-to-use bittorrent client.

This free utilities includes an Apache server, a PHP server and a MySQL database. Once it is installed on your local computer, it provides a complete environment to develop offline dynamic websites.

LimeWire is a fast P2P file-sharing application designed to transfer all kinds of files (music, video, pictures, applications, documents...).

Here is a very helpful freeware : with HFS, you can get access to all the files which are on your computer, from any other computer.

This free FTP server with a user-friendly interface monitors all connections from every sources and allows you to control the access to the files on your server and all the operations made on them.

This FTP client is free for a non-commercial use and has an customizable interface which looks like Windows Explorer.