Browser Plug-ins

According to Wikipedia, a plug-in is "a computer program that can, or must, interact with another program to provide a certain, usually very specific, function." Browsers plug-ins usually display multimedia content that enhances the browsing experience. Some of the most popular ones are listed below:

Adobe Acrobat Reader
View PDF files on Windows, Macintosh, and a variety of other operating systems and portable devices. Free to download.

Flash Player
View animations, interactive menu systems, presentations and multimedia on Windows, Macintosh, and a variety of other platforms/browser combinations. Free to download.

RealOne Player
Listen to audio and view video on Windows, Macintosh, and Unix/Linux. Free to download.

QuickTime Player
View video on Windows and Macintosh. Basic QuickTime Player now supports QuickTime VR as well. Free to download.

Shockwave Player
View streaming multimedia on Windows and Macintosh. Free to download.