PtrUtils is a module which forces the active point of ptr_write (the I pointer in writable icons) to be in the centre. It also allows you to set the active point of a pointer by setting a transparent point in the pointers mask (PRM3-33).
Works with all versions of RISC OS
HideSCSI is a Configure Plugin for RISC OS 5. It allows you to set which SCSI devices are visible on the iconbar.
Requires at least RISC OS 5.10