What are some alternatives?
When comparing ClockingIT and GanttProject, you can also consider the following products
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.
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.
RescueTime - Time management software that shows you how you spend your time & provides tools to help you be more productive.
MOOVIA - The easiest way to collaborate on projects and ideas.
Redmine - Flexible project management web application