The Tor Network.

Everyone has the right to freedom of opinion and expression; this right includes freedom to hold opinions without interference and to seek, receive and impart information and ideas through any media and regardless of frontiers.

— Article 19, Universal Declaration of Human Rights (1948)

What is Tor?

Tor is a tool that allows users to browse the internet anonymously and bypass censorship.
It is simultaneously a software application, a network of over 7,000 volunteer-run servers, and a global project supported by thousands of contributors.

More details are available on Wikipedia.

Everyone has the right to access the Internet and to communicate online using tools, including technical ones, that protect anonymity and prevent the collection of personal data—especially to exercise civil and political freedoms without discrimination or censorship.

— Article 10, Paragraph 1, Declaration of Internet Rights (Italy)

Who uses Tor?

Privacy-preserving tools like Tor are beneficial to everyone.
Tor helps users exercise their right to anonymity—a right protected under national, European, and international frameworks.

The European Parliament […] explicitly encourages the development and use of technologies enabling anonymous and/or pseudonymous access to digital services and communications, and rejects the one-sided view that such tools are solely used for criminal purposes. Instead, it emphasizes their role in empowering human rights defenders both inside and outside the EU.

European Parliament Resolution (8 September 2015)