Open access articles published online are free of charge for anyone to read. The article may have been originally published as open access, or there may be some version of it that has been self-archived, e.g. in the publication archive.
Journal.fi - Finnish Scholarly Journals Online
Most of the journals are immediately open, i.e. as soon as they appear for free to read.
Unique and extensive index of diverse open access journals from around the world.
FinELib tips how to access a scientific article if the organisation does not have a valid license agreement for that journal.