OOD / OOP Etudes / Code exercises

Question

I\'ve been searching the web for some time now. I am looking for small sample exercises for OOD practice (& for some internal TDD workshops).
If there is one single plac

Answer 1

Jeff Bay's Object Calisthenics. Following these will improve your OO skills.

Answer 2

http://butunclebob.com/ArticleS.UncleBob.TheBowlingGameKata

Answer 3

Bill Wake's spreadsheet TDD challenge

Answer 4

http://schuchert.wikispaces.com/Monopoly%28r%29

Answer 5

Dave Thomas' CodeKata

Kindness,

Dan

Answer 6

From the AGPPnP book by Robert Martin aka UncleBob
CoffeeMaker Mark IV - Page 2 has the problem statement