Is there a version of RealPlayer for RISC OS?
Not really. There is a player for very early RealAudio files (pre-1996) by Kira L Brown and Justin Fletcher, but these are seldom found today and it is unable to cope with streamed audio. In 1995/6 Acorn and Warm Silence Software cooperated to port the then-current RealPlayer as part of the Network Computer project. Acorn are said to have loaned a RiscPC to Progressive Networks (now Real Inc) to allow them to compile the core routines without releasing them outside the company. However it is said that Progressive Networks asked for a five or six figure sum to allow release of this version, and so the project was canned. Circa 2002 Real Inc performed a partial release of the RealPlayer source code through its HelixCommunity website. The source to Helix Player, a player frontend, is available for relatively unrestricted download. This does not contain source to the RealPlayer decoders. They, including ARM-optimised variants, are available at zero-cost but under a more restrictive licence