[inferiorhuman]

It's been a long time since I've dug for C++ docs but in general I found Qt to be well documented (if a bit disorganized with the newer stuff). STL documentation always seemed inaccessible to me, but then again I'm working off of some pretty hazy memories.

[jacobr1]

Commercially supported software Qt (and in the parent post, Vue) tend to have good docs. It makes sense: supporting developers is their business model. Likewise tools with ecosystems of companies (postgresql) tend to get good docs over time. The bigger pain points are tools supported by a major company ... but that used by the business rather than sold. There probably are _some_ good docs - especially at the project launch or major milestones - but they aren't as actively curated.