Listography - Create your lists, preserve your story, and stay inspired.
Visual Outliner - Visual Outliner is an outliner software for Windows, and it uses OPML as native file format.
List Challenges - Earn points for your life experiences. Find lists that interest you, and mark off what you've done.
Lifetick - Lifetick is an online Goal Setting application with a stylish, easy to use interface.
Bucketlist.org - Log and catalog all the stuff you want to accomplish before you expire.
Todoist - Todoist is a to-do list that helps you get organized, at work and in life.