DataHub is an open-source metadata platform providing search, discovery, and end-to-end lineage across warehouses, pipelines, and BI tools via push-based ingestion.

OpenMetadata is an open-source metadata platform combining catalog, lineage, data quality tests, and collaboration on a single schema-first foundation with many connectors.

Great Expectations (GX) is an open-source Python framework for declaring, validating, and documenting data quality expectations inside pipelines.

The AWS Glue Data Catalog is a fully managed, Hive-compatible metastore that resolves table definitions — including Iceberg tables — for engines across the AWS analytics stack.

Apache Polaris is an open-source catalog implementing the Iceberg REST specification, enabling interoperable, vendor-neutral table access across engines and clouds.