Adobe Reader
By Adobe
For viewing and printing Adobe Portable Document Format (PDF)
Support Documentation: Windows, Linux, Mac OS X | Acrobat Reader FAQ
Adobe Flash Player
By Adobe
Adobe Flash Player is the universal rich client for delivering effective Adobe Flash experiences across desktops and devices.
Support Documentation: Windows, Linux, Mac OS X | Flash Player FAQ
Java
The Java Runtime Environment enables your computer to run applications and applets that use Java technology.
Support Documentation: Windows, Linux, Mac OS X | Java Plugin FAQ
QuickTime
By Apple
QuickTime Player is an easy-to-use application for playing, interacting with or viewing video, audio, VR or graphics files.
RealPlayer
RealPlayer enables your computer to play streaming RealVideo and RealAudio.
Windows Media Player
By Microsoft
Windows Media Player lets you play streaming audio, video, animations, and multimedia presentations on the web.