Acorn Arcade's latest hosted site, asylum.acornarcade.com has now launched. Head there now for all the latest news and downloads for the games Asylum and Oddball, which were written by Andy Southgate in '94 and '95 respectively.
You should be able to find both the demos and full versions available for download, as well as the previously mentioned Asylum editor nobrainer, some obligatory cheats, and lots more besides. Both games have been shown to be StrongARM and RISC OS Select compatible, so what are you waiting for?