RealPlayer is a media player, produced by RealNetworks. It plays many multimedia formats, including the proprietary RealAudio and RealVideo codecs.

The RealPlayer plugin was a popular way to embed media in web pages before HTML5. The first version of RealPlayer was introduced in April 1995 as RealAudio Player, one of the first media players capable of streaming media over the Internet.

This RealPlayer plugin is still available from Real Networks, Inc. There are free versions of the plugin that can play a broad range of media types and paid version with additional features. To install the Real Player plugin in K-Meleon:

1. Go to https://www.real.com/
2. Download and run the installer.
3. Restart K-Meleon.
4. Type "about:addons" into your URL bar. You should now see the RealPlayer plugin along with options to activate or deactivate the player.