txtorcon is a Twisted-based asynchronous Tor control protocol implementation. Twisted is an event-driven networking engine written in Python, and Tor is an onion-routing network designed to improve people’s privacy and security on the Internet. It includes unit-tests with 96%+ coverage, multiple examples, and documentation. There are abstractions to track Tor configuration and state (circuits, streams), launch private instances, support Hidden Service, and more.
Pagekite is software to make servers on "localhost" visible to the wider Internet. It can be used by Web developers to show off their works in progress to clients or colleagues, embedded developers who need direct access to devices in the field, or as an alternative to dynamic DNS for individuals/hobbyists who would rather host their own content than rely on 3rd party hosting. It creates and maintains a tunnel between your server on localhost and a remote "front-end" (a reverse proxy). Only the front-end has to have a visible IP address; the server itself can reside on a heavily firewalled computer, a mobile device, or even an anonymous node on the Tor network.
Ozirion is an experimental Web browser allowing people and groups to improve their privacy on the Internet by hiding their IP address through a network of virtual tunnels. The current release of Ozirion relies on the Tor technology. It includes a built-in Tor server and provides the ability to choose or ban countries in order to use an IP address from a specific country. The Privoxy local proxy is used for better privacy. Ozirion is totally independent from the Tor and Privoxy projects.