Activiti

This is a really useful OpenAPI governance tool using Spectral rules. It was created by the Italian government for anyone to fork and run 100% on GitHub. It is a React app you can download and use locally, then build and publish to GitHub pages. I is really useful for demos and is easy to customize with different JSON or YAML, going beyond just OpenAPI, and assemble different rulesets for different governance purposes. The editor will do YAML or JSON linting with intellisense in the Monaco editor–driven by a single JSON Schema file. It is a really slick editor, and useful to have around.