Firebase - Firebase is a cloud service designed to power real-time, collaborative applications for mobile and web.
WrapAPI - Build an API on top of any website
Supabase - An open source Firebase alternative
Airtable - Airtable works like a spreadsheet but gives you the power of a database to organize anything. Sign up for free.
RemoteStorage - An open protocol for per-user storage OWN YOUR DATA
Albato - No matter the process. Automate it with no-code.