Another category, searchable interfaces, may fit into one of these or may be it’s own separate category. But tools like MacOS Spotlight or the command palette in some editors are very useful for power users. Having every command available through a minimal set of fuzzy keyboard strokes is a significant productivity boost, while also allowing some degree of discoverability.

As an aside, if anyone at Adobe is reading this, this sort of tool would be an excellent addition to Illustrator, Photoshop, etc. InDesign already has something like it, although that implementation leaves a little to be desired.