Thorium is great; it's closer to a virtual tabletop for starship RPGs than a standalone game, built around creating interactive narratives. That sets it apart from the more straightforward game-style bridge sims, like Artemis[1] and EmptyEpsilon[2], which have scriptable scenarios with narrative elements but have more fundamentally game-focused mechanics.

All of these get used in a lot of fun ways for live events beyond their design, too. Thorium's "family tree" comes from interactive events at planetariums, and EmptyEpsilon, being open-source with an HTTP API and game-master screen for directly manipulating live game state and pretending to be ships, became a popular front-end for European LARPs.[3]

1: https://www.artemisspaceshipbridge.com/#/

2: https://daid.github.io/EmptyEpsilon/

3: https://www.odysseuslarp.com/blog/steering-the-starship-empt...