And Opera, and browser tabs, I believe. And the search box in browsers (from Opera).
Tabbed browsing was present in Windows browsers before Opera. There were a lot of browsers that just embedded IE's Trident engine, and some of them had tabbed browsing. Wikipedia says that the first was NetCaptor in 1997. It does sort of make sense that this happened on Windows, because tabs are a natural variation on MDI.
Well, at least they took it mainstream.
Linux, irc and MySQL.
What's not to like about Linux or IRC or even MySQL?
The back ticks to escape MySQL columns ;) But that doesn't remove the huge thanks for producing reliable OSS at such a level that it's a competitor to Oracle.
Wasnt MySQL Swedish?
There were two founders, one Finnish and the other Swedish.
The original author, Michael Widenius is a Finlandswede (swedish speaking minority in Finland).
He founded the company MySQL AB together with two Swedes in Sweden.
You forgot Dovecot.
I forgot SSH, from the list of significant Finnish OSS projects, though I think original SSH by Tatu Ylönen was freeware, not OSS proper.
Buzz sequencer. But that's a niche software product.
Long cold winter nights gives plenty of time for hacking ...