The Tor Project is a network of virtual tunnels for improved personal privacy while surfing the internet. This network they have created is a set of applications that can share information without compromising your privacy.
You can use Tor to keep websites from tracking your IPs and your navigation on the web. You can also use it to connect to news sites, instant messaging services or even when these are blocked by local Internet providers. Tor services let users publish web sites and other services without revealing the location.
This service is aslo popular by journalists, NGOs to enable their workers to connect to their websites while in a foreign country, without notifying everybody nearby that they are working with that organization, the police uses Tor for visiting or surveilling web sites without leaving government IP addresses in their web logs. The variety of applications you can use with this network is very large.
The aim of Tor in the future is to increase the number of users that can use the service and improve usability and increasingly asking that everyone involved in the project as it sees fit.
Visit The Tor Project