[HappyFapMachine]

QT wasn't so bad as far as I remember.

But as jolmg pointed out, some projects are just simple readme and that is more than enough. Love those. But the total opposite is also common, a wall of text that is meaningless and in the end, you have to go through the source code to get some answers...

[slavik81]

Qt had amazing documentation around Qt 4.5. It's still really well-written—especially the old stuff—but their biggest problem is that they're awful at maintaining websites. The expected lifespan of a link to a page in their documentation is about two years.