Firebase - Firebase is a cloud service designed to power real-time, collaborative applications for mobile and web.
Documize - Enterprise-grade wiki and knowledge management platform
Flatfile - The new standard for data import
HackMD - Fast and flexible, real-time collaborative markdown, inspired by Hackpad.
Blazor - An experimental web UI framework using C#/Razor and HTML, running in the browser via WebAssembly
ReadTheDocs - Spend your time on writing high quality documentation, not on the tools to make your documentation work.