Open Source

Open source tools I've created, maintain, or have helped to maintain.

The blocks of the Open Data Contract Standard v3: fundamentals, schema, data quality, pricing, team, security, SLA, infrastructure, support, business rules, and tags and custom properties

Open Data Contract & Product Standards Linux Foundation 1k+ stars

The open standards that data contracts and data products are written in: ODCS describes the schema, semantics, quality, and SLAs of a data interface, and ODPS describes the data product that serves it. Both are Linux Foundation projects governed under Bitol — and the standards the Data Contract CLI and Data Contract Editor implement.

ODCS ODPS

Created in 2023 (not by Simon)

Simon serves on the Technical Steering Committee for both standards

Data Contract CLI Thoughtworks Tech Radar 950+ stars 1.4M monthly downloads

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.

GitHub

Created in 2023

Co-maintained with Jochen Christ

Also on datacontract.com and PyPI.

Data Contract Editor 100+ stars

Web-based visual editor for ODCS data contracts. Authoring, validation, and previewing in the browser — no install required.

GitHub

Created in 2024

Co-maintained with Jochen Christ

Try it at editor.datacontract.com.

Data Landscape 20+ stars

An opinionated, interactive map of the open standards that power a modern data architecture — ODCS, ODPS, OSI, OpenAPI, Iceberg, OpenLineage, OpenTelemetry and more.

GitHub

Created in 2026

Curated by Simon at Entropy Data

Explore at data-landscape.com.