What are some alternatives?
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.
Basecamp - A simple and elegant project management system.
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.
Teamwork Projects - The Project Management App for Professionals. The most powerful and simple way to collaborate with your team.
Redmine - Flexible project management web application
Smartsheet - Smartsheet is an intuitive online project management tool enabling teams to increase productivity using cloud, collaboration, & mobile technologies.