Evernote - Bring your life's work together in one digital workspace. Evernote is the place to collect inspirational ideas, write meaningful words, and move your important projects forward.

Todoist - Todoist is a to-do list that helps you get organized, at work and in life.

Tyke - Mac menu bar app that @torrez really needed to take notes

Trello - Infinitely flexible. Incredibly easy to use. Great mobile apps. It's free. Trello keeps track of everything, from the big picture to the minute details.

Thought Train - Stop using sticky notes to remember what you're doing 📒 🚫

Remember The Milk - Remember The Milk is a task and time management application for mobile devices.