AudioCD - a CD player by Thomas Baldwin. - http://www.dcs.shef.ac.uk/~tom/Software/audiocd.html
CD Status - Displays various information about the current state of the CD-ROM drive for both audio and data CDs. - http://www.xlcus.co.uk/software/acorn/index.shtml#cdstatus
AcornCD - A CDDB server for RISC OS. Site includes the download, a version history and the interface specification. - http://eh.org/~john/acorncd/