Open Source
Open source tools I've created and maintain.

Data Contract CLI Thoughtworks Tech Radar 850+ stars
A CLI tool to validate, test, document, and export data contracts based on the Open Data Contract Standard. Supports 15+ data sources including Snowflake, Databricks, BigQuery, and Postgres.
Co-maintained with Jochen Christ
Also on datacontract.com and PyPI.

Data Contract Editor 80+ stars
Web-based visual editor for ODCS data contracts. Authoring, validation, and previewing in the browser — no install required.
Co-maintained with Jochen Christ
Try it at editor.datacontract.com.
mob.sh Thoughtworks Tech Radar 1.7k+ stars
A CLI tool that makes swap turns in (remote) mob and pair programming a one-liner. Used daily by developers around the world.
Created by Dr. Simon Harrer in 2018
Now maintained by Gregor Riegler & Joshua Töpfer
More on mob.sh.