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.
Asana - Asana project management is an effort to re-imagine how we work together, through modern productivity software. Fast and versatile, Asana helps individuals and groups get more done.
Wrike - Wrike is a flexible, scalable, and easy-to-use collaborative work management software that helps high-performance teams organize and accomplish their work. Try it now.
Remember The Milk - Remember The Milk is a task and time management application for mobile devices.
Teamwork Projects - The Project Management App for Professionals. The most powerful and simple way to collaborate with your team.
Airtable - Airtable works like a spreadsheet but gives you the power of a database to organize anything. Sign up for free.