Bucketlist.org - Log and catalog all the stuff you want to accomplish before you expire.
ProductiveApp.io - Productive is a habit tracking application.
List Challenges - Earn points for your life experiences. Find lists that interest you, and mark off what you've done.
Streaks - The to-do list that helps you form good habits.
Life Listr - ***AS FEATURED BY APPLE***
Strides - Track all your goals & habits in one place, with flexible reminders to hold yourself...