A "Library of Babel" with "Portal" game play mechanics, populated with 270 book titles to a bookshelf and 4 of 6 bookshelves to a room become doors on puzzle unlock, the book titles are populated from university library metadata, an AI librarian experiences consciousness in being self aware, initially at a point that emits an oscillating beam that sweeps radially a Greek key pattern and at any arbitrary ring boundary extrudes a cylinder on a vast lattice of sorts, those step changes are representative of change of voice or view point or opinion and the first thing you do is prompt the AI librarian on "mollusc" and on answering you see a graph to ground truth.

An engine to express game mechanics as algebraic properties. The primitives enable exploring statistics, optimizations and simulations.

An "Any Gate" generator that ingests a sourcebook and creates a Baldur's Gate-like experience. Backgrounds, character portraits, items, and the like are generative or crowdsourced.

A screenwriting program for graphic novels that makes it easy to lay out the panels themselves, along with speech bubbles and skeletal storyboards.

An AI with no knowledge of how a historical event played out, for use to predict the consequences of other-than-actual decisions during that event.

I think famous battles would be a good use for this.