SQL playground - Create a private PostgreSQL database with a predefined structure & test data in the shortest time.
Supabase - An open source Firebase alternative
Google Cloud PostgreSQL - Fully-managed database service
Unbounded - Serverless NoSQL database you query with JavaScript
SnowyOwl - A user friendly tool to manage your dataset
Hasura - Hasura is an open platform to build scalable app backends, offering a built-in database, search, user-management and more.