Google Cloud PostgreSQL - Fully-managed database service
Supabase - An open source Firebase alternative
Unbounded - Serverless NoSQL database you query with JavaScript
Slack SQL - Execute SQL queries inside of Slack
pREST - A fully RESTful API from any existing PostgreSQL database written in Go
pganalyze Index Advisor for Postgres - The index advisor makes recommendations for creating the best indexes for your Postgres queries, based on the schema and table statistics information.