What are some alternatives?
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.
Todoist - Todoist is a to-do list that helps you get organized, at work and in life.
Asana Timeline - Visualize your project plan so you can hit your deadlines.
Remember The Milk - Remember The Milk is a task and time management application for mobile devices.
Clear for Apple Watch - Productivity reimagined for your wrist
monkeylearn - Text Mining Made Easy. Extract and classify information from text. Integrate with your App within minutes.