Greece

The national open-data catalogue: 22,000+ datasets from 370 ministries, regions, municipalities and agencies — geospatial layers, statistics, registers, budgets, measurements — each with its publisher, licence and files, and the rows of the tabular ones queryable in place.

Every administrative act the Greek state publishes under the Transparency Programme (ν. 4305/2014): appointments, expenditure, contract awards and regulatory decisions, each carrying a unique ΑΔΑ and a signed PDF.

The City of Athens open-data portal: 460+ datasets on the city itself — daily visitor counts from the Smart Neighbourhood WiFi network, parks and green space, street furniture and GIS layers, traffic and municipal services — with the tabular ones queryable in place.

The Central Electronic Registry of Public Contracts (Κεντρικό Ηλεκτρονικό Μητρώο Δημοσίων Συμβάσεων): every step of Greek public procurement as the law requires it to be posted — the request for a purchase, the tender notice, the signed contract and the payment order — each with its ΑΔΑΜ code, the buying body, CPV items, amounts and the signed PDF.

The National Registry of Administrative Procedures (Εθνικό Μητρώο Διοικητικών Διαδικασιών «Μίτος»): every procedure a person or a business can ask the Greek state for — what it is, who provides it and where, which documents it needs, what it costs, the steps in person and on gov.gr, and the law behind it.

The Greek earthquake catalogue: every event the Institute of Geodynamics locates from the Hellenic Unified Seismic Network, from the barely-recorded to the destructive, with the time, place, depth and local magnitude of each and the quality of the solution behind it.

The EU VAT Information Exchange System: turns a VAT number into the name and address it is registered to.