Reality Editor - MIT's new app lets you program any object
Proxyman.io - Proxyman is a high-performance macOS app, which enables developers to view HTTP/HTTPS requests from apps and domains.
My Devices - Drag and drop IoT project builder for Raspberry Pi
code-ray - Live debugging tool for software developers
PlatformIO - Next-generation IDE for IoT
Reactime - Time travel debugging tool, visualizing and tracing state