The RealMedia Browser plugin supports Internet Explorer, Opera, Netscape and Mozilla.
Real Alternative Lite allows you to play RealMedia files in all DirectShow enabled players. Without this filter RealMedia files can only be played in Media Player Classic. This filter only works with files that are on your harddrive. It does NOT work with streaming content. Therefore it is highly recommended to use Media Player Classic, because MPC does support streaming content.
The only difference between the regular and lite versions is that the lite version does not include Media Player Classic
Real Alternative will allow you to play RealMedia files without having to install the official RealPlayer. You do need a media player that is capable of playing RealMedia files. The included Media Player Classic supports it. Supported are RealAudio (.ra .rpm), RealVideo (.rm .ram .rmvb), RealText (.rt), and ReadPix (.rp). Not fully supported are: Streaming smil files (.smi .smil) and Realmedia embedded in webpages.