Ask HN: Any recommendation for a help authoring tool for my web app?

Dear fellow HNers, I need to put together a help site for my B2B SaaS app and I'd rather focus on the content than the implementation.

I've already identified helpIQ but I'd like to see a few alternatives before I make my choice.

main requirements: - hosted or self-hosted - provide table of content, search - no need for chm or whatever specific export format

Thanks!