I never heard of it but will definitely check it out. “Listible”:http://www.listible.com/ is a (beta) service where you can make your own Best-Of lists. I am very honoured to be in “the top 10 of Best GTD resources”:http://www.listible.com/list/the-best-gtd-resources on the web according to this list. I will try harder to get into the top 5 🙂