Stripe Docs

Open any page of docs.stripe.com: prose on the left, code on the right, and that right panel stays in sync as you scroll. Switch from curl to Node or Python, the example changes instantly, and your language choice follows you from page to page. Dozens of technical docs have copied this pattern since — rarely this well. The other strong decision is the architecture: everything is organised by product vertical (Payments, Revenue, Money management…) rather than by API — that is, by the reader's intent, not the internal org chart. Documentation this dense that stays readable: that is the real luxury.