Real Alternative will allow you to play RealMedia files without having to install RealPlayer.
All RealMedia formats (.ra .rm .rmvb .ram .rpm .rv .rp .rt .rnx .smi .smil etc.) are supported, including streaming content and RealMedia content that is embedded in webpages.
* Updated Media Player Classic to version 22.214.171.124 rev. 50
* Updated RealMedia components to version 126.96.36.1996
Product page: here