First of all is not a hacker tool. Nor is it illegal to use. Nor is it spyware.

bittorrent logo An Introduction to BitTorrent

In this introduction I’ll try to explain the BitTorrent was
written to solve. And show you how to use it to download large popular
files.

The Problem with Publishing:

More customers require more

central An Introduction to BitTorrent

The BitTorrent Solution:

Users cooperate in the distribution

torrent An Introduction to BitTorrent

You have something terrific to publish — a large music or video file,
, a game or anything else that many people would like to have.
But the more popular your file becomes, the more you are punished by
soaring bandwidth costs. If your file becomes phenomenally successful
and a flash crowd of hundreds or thousands try to get it at once, your
server simply crashes and no one gets it.

There is a solution to this vicious cycle. BitTorrent, the result of
over two years of intensive development, is a simple and free software
product that addresses all of these problems.

The key to scaleable and robust distribution is cooperation. With
BitTorrent, those who get your file tap into their upload capacity to
give the file to others at the same time. Those that provide the most
to others get the best treatment in return. (“Give and ye shall
receive!”)

Cooperative distribution can grow almost without limit, because each
new participant brings not only demand, but also supply. Instead of a
vicious cycle, popularity creates a virtuous circle. And because each
new participant brings new resources to the distribution, you get
limitless scalability for a nearly fixed cost.

BitTorrent is not just a concept, but has an easy-to-use implementation
capable of swarming across unreliable networks. BitTorrent
has been embraced by numerous publishers to distribute to millions of
users.

The offical BitTorrent site has lots of useful information about its implementation. Its here your will find the lastest versions to download.