Notebook.ai - A smart notebook that grows and collaborates with you
Gone - An ephemeral to-do list
Moleskine Smart Notebook - Turn hand-drawn sketches into fully workable vector files
Streaks - The to-do list that helps you form good habits.
Note Anywhere - Leave sticky notes on tabs in Chrome
Todoist - Todoist is a to-do list that helps you get organized, at work and in life.