Tor is a free software that enables users to browse the internet anonymously, preventing tracking by websites and allowing access to blocked content. It is used by individuals to protect their online privacy, connect to blocked services, and engage in socially sensitive communication. Journalists and NGOs rely on Tor to communicate securely with sources and workers, while corporations use it for competitive analysis and to protect sensitive information. Law enforcement and the military also utilize Tor for surveillance and intelligence gathering. The Tor Project, which relies on a network of volunteers, develops tools to protect journalists and sources from being monitored.