n8n (automation)

A fair-code workflow automation tool that lets you build complex, multi-step pipelines by syncing 400+ native integrations with custom JavaScript logic.

n8n bridges the gap between simple no-code triggers and heavy engineering. Its node-based canvas handles sophisticated branching and data mapping across tools like PostgreSQL, Slack, and OpenAI without the rigid constraints of Zapier. You can self-host the platform via Docker to ensure data privacy or use their cloud version for immediate scaling. By allowing users to write custom JS functions directly into any node, it provides the flexibility to transform JSON payloads or handle complex API authentication (OAuth2, API keys) in a single, visual interface.

https://n8n.io