Everything here is built on open data and open-source software. Each project names its own sources and licences on its own pages; this is the whole list in one place, with the licence as the publisher states it. Where a figure has no named publisher, it does not get published. Updated September 2026.
Traficom (CC BY 4.0) for fibre rollouts; Tukes and vaarallisettuotteet.fi, the Finnish Food Authority and the EU Safety Gate for recalls; the State Treasury (haeavustuksia.fi) for grant calls and (tutkihankintoja.fi, CC BY 4.0) for state purchase invoices; the Finnish Environment Institute and its Ryhti built-environment system (CC BY 4.0) for building permits; Hilma, the Ministry of Finance notice channel, for procurement; the Finnish Patent and Registration Office and the Business Information System for registered businesses and trademarks; the Government project window and lausuntopalvelu.fi for consultations; Statistics Finland StatFin (CC BY 4.0) and the Tax Administration for the cost-of-living section. The full list with update rhythms is at vahti.org/tietoa.
Open EU registers, each section named on the site: the Funding and Tenders Portal, the EU Financial Sanctions Files, the European Banking Authority register, ACER REMIT (CEREMP), DG Competition, ECB banking supervision, Tenders Electronic Daily, the European Medicines Agency, ECHA and the REACH candidate list, EASA airworthiness directives, the EU Pesticides Database, the EU Safety Gate and RASFF, CTIS, the eIDAS trusted lists, eAmbrosia, Have Your Say, the ENISA EU Vulnerability Database and Copernicus EMS.
Finland: Statistics Finland, the National Land Survey, the Tax Administration, the cities of Helsinki, Vantaa and Tampere and HSY (all CC BY 4.0), and OpenStreetMap contributors (ODbL). Denmark: Statistics Denmark, Finance Denmark, Plandata.dk and DMI Klimaatlas (CC BY 4.0), DAWA and the Danish Environment Portal (CC0). Sweden: Statistics Sweden, including the DeSO areas and the municipal boundaries (CC0), SMHI and MSB (CC BY 4.0).
Wikidata (CC0) behind most of the guessing games; the Smithsonian Institution Global Volcanism Program (Volcanodle); the United States Geological Survey (Quakedle); OurAirports (Airport-dle); OpenFlights (Airline-dle); the NOAA aviation weather service (METAR Daily, TAF Daily). Reveal text is quoted rather than generated: English Wikipedia extracts under CC BY-SA 4.0, and each volcano's own geological summary. Every game repeats its own sources, licences and photograph credits on its own attribution page.
Birds of Finland: eBird and Clements taxonomy with BirdLife Suomi Finnish names, conservation status from Wikidata (CC0), occurrence and seasonality from GBIF (CC BY), morphometrics and habitat from AVONET (CC BY 4.0), diet from EltonTraits 1.0 (CC0). K-pop packs: MusicBrainz (CC0). Astronomy: NASA-derived records. Chemistry and geography: committed reference snapshots. The creature-collection packs are marked in the packs themselves as personal learning only and not for sale; those names are trademarks of their owners.
Both generate their output from their own packs and themes, so nothing third-party is embedded in what you download. PageForge ships plain HTML and CSS with system font stacks and no external requests; its source is public at github.com/mtclab/pageforge.
Open source under the MIT licence at github.com/mtclab/localbench. The file work is done in your browser by permissively licensed Rust crates compiled to WebAssembly, among them image, lopdf, zip, flate2 and zune-jpeg.