NodeRED

• Source: https://github.com/node-red/node-red
• License: Apache 2.0
• Alternatives: Decree, n8n, Home Assistant automations
• Status: RIP — primary use case is IOT, not general automation

Features

• Browser-Based Visual Editor: Wire flows by connecting node boxes
• Large Node Ecosystem: Thousands of community nodes for IoT, APIs, databases, and protocols
• MQTT & IoT Native: First-class support for MQTT, serial, and hardware integrations
• JavaScript Functions: Drop into code at any point in a flow
• Low Resource Usage: Runs on Raspberry Pi and other low-powered hardware
• Flow Library: Share and import flows from the public Node-RED library