I had a lot of insights generated from this opensource program. https://medium.com/guesstimate-blog/introducing-guesstimate-a-spreadsheet-for-things-that-aren-

I had a lot of insights generated from this opensource program. https://medium.com/guesstimate-blog/introducing-guesstimate-a-spreadsheet-for-things-that-aren-t-certain-2fa54aa9340#.um4q5txph https://medium.com/guesstimate-blog/introducing-guesstimate-... https://github.com/getguesstimate/guesstimate-app https://github.com/getguesstimate/guesstimate-app