Botkit - Botkit is an open source developer tool for building chat bots, apps and custom integrations for major messaging platforms.
Firebase - Firebase is a cloud service designed to power real-time, collaborative applications for mobile and web.
Botpress - Open-source platform for developers to build high-quality digital assistants
Supabase - An open source Firebase alternative
restdb.io - restdb.io lets you create databases and REST APIs quickly. Development databases are free. Powerful web-based and mobile-friendly data management.
RemoteStorage - An open protocol for per-user storage OWN YOUR DATA