What are some alternatives?
When comparing Iris and Asana, you can also consider the following products
Moka - Moka is a Gnome Shell theme that uses simple geometry & basic colouring.
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.
Eyeleo - EyeLeo is a handy PC application that reminds you to take a break for your eyes.
Basecamp - A simple and elegant project management system.
Materia - Materia is a development environment to build advanced mobile and web applications.
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.