Firebase - Firebase is a cloud service designed to power real-time, collaborative applications for mobile and web.
Fiddler - Fiddler is a debugging program for websites.
CloudBoost.io - One Complete Database Service that does data-storage, search,real-time and a whole lot more.
Proxyman.io - Proxyman is a high-performance macOS app, which enables developers to view HTTP/HTTPS requests from apps and domains.
Supabase - An open source Firebase alternative
HTTP Toolkit - Beautiful, cross-platform & open-source tools to debug, test & build with HTTP(S). One-click setup for browsers, servers, Android, CLI tools, scripts and more.