The screenshots of RISC OS bring back fond memories of playing with it in our school computer room (which was mostly BBC Micros but had a few RISC) - mostly playing Lemmings as I recall! It felt pretty cool at the time though
I think fireworkz pro was the next evolution of the concept.
The "Icon Tray" here is actually the "Icon Bar" and discussed so widely it's the name of the main Risc OS forum to this day.
Pipedream always was spectacularly odd, even at the time.
My browser had this down as a phising site? The actual content seems fine though.
Brings back good memories of playing fun games with my siblings.
Our first computer was an Acorn BBC B Microcomputer.
In some ways Archimedes' RiscOS was ahead of its time, in some ways it was a disappointment. It never matured due to lack of momentum, market share.
I suppose that most of all, it reminds me of time when actual, genuine real innovation in UI design was still on the menu.
I used PipeDream on the Cambridge Z88, and only briefly tried it on other platforms under the PipeDream (Archimedes, MS-DOS) and Fireworkz (Windows) names. I think it was a great moonshot of an idea, ahead of its time when you consider Affinity has done the same thing with Illustration/Layout/Photos.