KintoHub - A modern fullstack app platform
Proxyman.io - Proxyman is a high-performance macOS app, which enables developers to view HTTP/HTTPS requests from apps and domains.
goa - A design driven approach for building microservices in Go
Endpoints - View and respond to requests on an HTTP endpoint
Epsagon - Track costs and fix your serverless application.
httpbin(1) - HTTP request and response service