Skype (the company) was founded by Niklas Zennström, a swede. Skype (the software) was originally developed by estonians.
The company is what is pertinent to the discussion :)
It was founded by Niklas Zennström and Janus Friis (Danish) in equal measure. The software was based on Janus Friis' earlier work (the Kazaa p2p network). It was developed by an outsourced team in Estonia.
As a Dane I'm a bit embarrassed to forget Janus Friis. Thank you for the correction and elaboration.