Early last month, ex-DoggySoft coder Andrew Clover released several of his RISC OS programs and their source for free on his website. This includes Desktop Hacker's little friend The Hacker, the puzzle game BombScare, handy Elite utility EliteExt, and desktop utilities such as NewerLook, ShiftKeys, and PaletteDM. All are released under a new-BSD license, and all can be found near the bottom of the software page of Andrew's site.
Desktop Hacker, on the other hand, is still a commercial product, and is available on the RISC User ...in a Nutshell from R-Comp.