Perian, Bringing VLC-Like Compatiblity to QuickTime

Perian is a project that allows your QuickTime (Mac only) player to play just about every video format, with the exception of Windows Media. Simply drag the Perian component to your QuickTime library directory and enjoy such benefits as DivX, 3ivX and XviD video compatibility. Before Perian came along, you would have to individually install each of these plugins.