Zinc is a video-centric browser formerly known as Zviewer, and designed for use on home theater PCs and Windows Media Center PCs.
Very similar to Boxee, it allows users to access online video content and media stored on their PC and view it on their TV.
It can tap into a user's Netflix and Amazon accounts to view that content as well as CBS' TV.com content, ABC, CNN, ESPN, CW, Fox, MTV, Yahoo Video, YouTube, Revision3, Cartoon Network, Nickelodeon, Jaman, and Hulu.