Corrective upvote. In the words of Wikipedia, "Skype was founded in 2003 by Janus Friis from Denmark and Niklas Zennström from Sweden" [1]. It would seem the developers were Estonian, but that doesn't make you wrong about its founders. In fact, that makes the article wrong when it says "Skype ... was run by Estonians, until recently was sold to Microsoft [sic]."

[1] http://en.wikipedia.org/wiki/Skype#cite_ref-14