Rubric Creation Software for Free

This morning I was reading an article about assessment in the flipped classroom.  This article referenced QuizStar which is a free tool for creating quizzes. At the bottom of the page, there were a list of other free tools for educators. The one that caught my attention was RubiStar which is another free tool to educators to create quality rubrics. I know that using rubrics with more problem based learning is the direction want to go this year and I am excited about this new tool to help make that happen.