CSC Scientist's User Interface SUI
Also access to IDA Storage service
IDA Storage service's detailed instructions
Etsin Research data finder
AVAA Open data publishing platform
FSD Data deposit service
Aila Data search and download service
EUDAT Collaborative Data Infrastructure, Data management, access, re-use, preservation and analysis service
Zenodo Research data repository
eDuuni Collaboration service environment
Cloud Guide (Pilvipalveluohje) by Finnish universities
DMPTuuli Tool for data management plans
Researchers, research groups or organisations can use Etsin to publish information on their datasets and offer them for wider use. Haka-authenticated users may enter information on their own datasets, and of others' datasets with their permission. The published metadata on the dataset is open to everyone. The dataset itself doesn't have to be open. For example, it is possible to publish metadata of the dataset stored in the USB-stick.
Detailed instructions of adding a description of the dataset and descriptions of the fields: http://openscience.fi/add-datasets
Some data storage services (e.g. FSD) harvests the metadata automatically when data is saved to the storage service.