I have been playing around with AMOS The Creator
. It is quite a useful little program, and it comes with some interesting games, including "AMOSteroids" (which is quite different to the version I played before I got my hands on AMOS) and Magic Forest.
Strangely, these are on the "Data" disk, not "Extras" as they should have been.
He was asking about software for the Amiga, not about its custom chips.