Notion

For people who enjoy building the system as much as using it. Notion puts notes, documents, databases and wikis in one place, which is wonderful for a shared team wiki or a reading tracker with filters, and a lot of ceremony for jotting down a phone number. Exports are better than its reputation: non-database pages leave as Markdown, databases as CSV, and the whole workspace can be exported from desktop or web, though some formatting comes out as HTML. The bigger lock-in is that it lives online. You can mark individual pages available offline on each device, but automatic downloading of recent and favorite pages is reserved for Business and Enterprise plans.