Datasets - Mannheim Linked Data Catalog

twc-opendap

Linked Data Provenance for OPeNDAP data processing.
provenanceweb

Linked Data provenance and explanation.
Instance Hub (all)

Linked Data representations of common entities and concepts that occur in many datasets.
The Living LOD Cloud

A lodcloud diagram, automatically. Based on quality standards.

You can also access this registry using the API (see API Docs).