List of free data-transformation stuff for developerππ½
If you're looking for all programming tools around data-transformation (not just free). Check this page List of data-transformation Programming Tools

dbt
dbt is a data transformation tool that enables data analysts and engineers to transform, test and document data in the cloud data warehouse.
Tag: data, database, data-transformation
Forever for one developer seat Browser-based IDE Job scheduling Unlimited daily runs One project limit Logging & alerting Data documentation Source freshness reporting Build on Pull Request Native support for GitHub and GitLab US hosted