More than 150 million copies of QuickTime Player are in distribution, with millions more distributed every month. And more than 20,000 applications and content CDs include QuickTime, with hundreds more licensed every month. QuickTime is a truly cross-platform technology. It supports Mac OS 7.5.5 and later, Mac OS X, Windows 95, Windows 98, Windows ME, Windows 2000, and Windows NT 4.0.
Player are free.
While QuickTime 5 is running, you can get help by selecting QuickTime Help from the Help menu. Click the Q in the QuickTime TV window to see current events, movie trailers, and news. Joining the Apple Developer Connection will give you access to resources for developing with QuickTime, including beta releases, sample code, tutorials, and more. Books about QuickTime are also available. There are many email discussion lists where users, developers, network administrators, and content authors can discuss QuickTime-related topics.