UsenetReviews.org is another one useful site about various Usenet services, Usenet providers, NZB sites and Usenet related software. This site provides a great overview over the existing Usenet newsreader clients - free and commercial, not only for PC or Mac, but also for mobile phones. Generally to access files from Usenet network you require three things: good Usenet provider with a great retention, a site where to find NZB files and a modern newsreader client to download files to your PC. All these basic things are reviewed in full on UsenetReviews. This will give you a good start for sure!