Open Source and Drilling Activities?

Yesterday I was triggered by a friend’s question whether it is possible to use or adopt open source application in drilling activities. In spite of the fact that most (perhaps all) of drilling softwares are Windows based and proprietary ones, but I see the potential possibilities. Do you agree with that?

This question is surely kind of waking me up and making my eyes wide open to explore more. In conjunction with this, I would like to ask your favor. Is there someone out there who has working case studies or experience and minds to sharing those with me? Hopefully we could contribute something useful to drilling world.

I am trying to come back soon with some insightful things regarding this matter.

Thank you.