For users, #tor fixes this - servers and relays can't be force to reveal your real IP and identity if they never had it. For operators, #tor also fixes this - they can't kick in your door and steal all your stuff if they can't even tell which continent your server is really in.

The Tor Project | Privacy & Freedom Online

Defend yourself against tracking and surveillance. Circumvent censorship.

for users,

Whonix

Whonix - Superior Internet Privacy

Whonix can anonymize everything you do online! It runs like an App, is a Free, Open Source and Kicksecure™ hardened Linux distribution.

for operators.