http://thecleancoder.blogspot.co.uk/2010/10/craftsman-62-dark-path.html
https://sites.google.com/site/tddproblems/all-problems-1/Reload-countdown
Similar to: http://codekata.pragprog.com/2007/01/kata_nine_back_.html
Various Code Katas/Dojos/Scribbles
Other stuff: https://docs.google.com/document/d/1T3jZcCYf476NvioG9xfkhPybkIKTfD4Plefe61YmiOI/edit