Airtable - Airtable works like a spreadsheet but gives you the power of a database to organize anything. Sign up for free.
Postman Workspaces - Organize and speed up API development work
Apinizer - Create, Secure and Publish your API in 21 seconds
Supabase - An open source Firebase alternative
WrapAPI - Build an API on top of any website
Firebase - Firebase is a cloud service designed to power real-time, collaborative applications for mobile and web.