PeterC wrote:

ISTR that there's a version of GIMP that's v. like Photoshop in some ways,
so that it's easier to learn than GIMP for those used to PS - GIMPshop or
something?

There is, but it's four years and two major releases behind GIMP proper,
once GIMP 2.8 is released it should be near enough for most users who
want a free photoshop equivalent, dunno if it'll have 16bit colour
support though.