I\'ve gotten quite interested in coding katas in recent months. I believe they are a great way to hone my programming skills and improve the quality of the code I write on the j
Emily Bache has a github repository with some refactoring katas: Emily Bache's Refactoring Kata Repo. There are variants of KataYahtzee and KataTennis to refactor. Also, she has a variant of the Gilded Rose Kata, which was designed as a refactoring kata.
Also, she has the Racing Car Katas in her repo: Racing Car Kata. The Race Car Katas also include good exercises for refactoring.
Those kata have the code in multiple langauages: