Klu - Find information instantly. Search engine that works for you.
Listography - Create your lists, preserve your story, and stay inspired.
Day Zero Project - The largest community of challenge based goal setters in the World.
List Challenges - Earn points for your life experiences. Find lists that interest you, and mark off what you've done.
RegExr - RegExr.com is an online tool to learn, build, and test Regular Expressions.
Bucketlist.org - Log and catalog all the stuff you want to accomplish before you expire.