Flash Player
Flash Player is a cross-platform browser plug-in that delivers breakthrough Web experiences to over 99% of Internet users
Real Player
RealPlayer, the free media player for all your mp3, flash and video needs.
Silverlight
Microsoft Silverlight is a web application similar to Flash, integrating multimedia, graphics, animations and interactivity for the web
iTunes
iTunes is a media player application, used for playing and organizing digital music and video files.
Quicktime
Quicktime, the free media player for all your music and video needs.