Open Source ETL pipelines. Sort of like Terraform for data teams. Meltano lets you define your data integration pipelines in a declarative way, and then it runs them for you. It’s built on top of Singer and leverages things like dbt, airflow, or dagster. My favorite one-off hacky way to use it is via Github Actions.

I was an employee at Meltano for a while, and I still think it’s a great project, not just for data teams but also for managing all the random data pipeline