Mac - Joost
Joost - is a system for distributing TV shows and other forms of video over the Web using peer-to-peer TV technology, created by Niklas Zennström and Janus Friis (founders of Skype and Kazaa). It's video – more than 20,000 shows, with more added daily. It's online – all you need is a broadband internet connection. Joost turns a PC into an instant on-demand TV without any need for additional set top box. News updates, discussion forums, show ratings, and multi-user chat sessions (often linked to the active stream/channel) are made possible through the use of semi-transparent widget overlays.