Torbutton provides a button to securely and easily enable or disable the browser's use of Tor. It is currently the only addon that will safely manage your Tor browsing to prevent IP address leakage, cookie leakage, and general privacy attacks.
xB Browser is the free and open-source anonymous web browser. It allows you to securely and anonymously surf the internet, and bypass firewalls and website censorship, and automatically clears surfing history and deletes cookies when you close it.
Vidalia is a cross-platform controller GUI for the Tor software. Using Vidalia, you can start and stop the Tor software, view its status at a glance, and monitor bandwidth usage
Torbutton provides a button to easily enable or disable the browser's use of Tor. For more information, visit the Torbutton homepage: http://torbutton.torproject.org/dev/