Collab on Code - Write code remotely in real-time with coworkers and clients
Proxyman.io - Proxyman is a high-performance macOS app, which enables developers to view HTTP/HTTPS requests from apps and domains.
Kite - Kite helps you write code faster by bringing the web's programming knowledge into your editor.
Sonar by Facebook - Extensible mobile app debugging for iOS and Android
Slowbug - Debug you code in slow-mo!
HTTPDump - A simple, beautiful Webhook debugging tool.