TaskMail is a cloud based free project management tool and issue tracker, built for teams. It provides effortless Work Collaboration with a simple and intuitive user interface that resembles email. It offers smart filters, shared labels, project roles, threaded replies, time tracking and everything you need to track and manage projects and issues with your Team at no cost.
via BetaList http://bitly.com/1QAhOIo
by Robert Hughey (Google+)