Copying erikj's comment from over there:
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I think Symbolics' Dynamic Windows and CLIM could be added to this gallery as well, as early examples of presentation-based user interfaces:
https://dspace.mit.edu/bitstream/handle/1721.1/41161/AI_WP_2....
ftp://publications.ai.mit.edu/ai-publications/2004/AIM-2004-005.pdf