Helsinki Region Infoshare
Open data service - Making better use of public data in the Helsinki region.
Opendata.fi is a service for publishing and utilising open data for everyone. The service is provided by Digital and Population Data Services Agency. The service has an especially wide catalogue of open public data such as public procurement data.
You can browse datasets, data providers or look at specific showcases of opendata. Various filter options include for example popular tags and locations.
You can see the most popular datasets here.
Go through the user guide to get a more profound understanding of the service.
see specific dataset for citing instructions