RISC OS Open Ltd. (also referred to as ROOL) is a limited company engaged in computer software and IT consulting. It is managing the process of publishing the source code to RISC OS. Company founders include staff who formerly worked for Pace, the company which acquired RISC OS after Acorn's demise.
The source code publication was initially facilitated by a shared source initiative (SSI) between ROOL and Castle Technology (CTL), prior to a switch to the more widely recognised Apache licence in October 2018. ROOL hopes that by making the RISC OS source code available for free it will help stimulate development of both the RISC OS source code and the platform as a whole.