What are the best software tools for test management?

A free, limited Community Edition of Klaros TestManagement is available. Notably, it lacks test documentation, project management, configuration capabilities. A full comparison can be found here.

Test steps can be taken via a mobile device.

For those that want to test out the full software there is a free trial of 30 days where users can see for themselves how it behaves.

Meliora Test Lab has some powerful features which make team collaboration easy and painless. Things like assignments and real-time notifications help a lot when working with teams.

If a project needs to get started with testing ASAP, Meliora Testlab allows users to get to that stage using a "simple workflow" which means that the project and the test cases don't need to be reviewed, simply add test cases and start testing.

XStudio has a free comunity edition available for up to 4 users and 200 tests.

The GUI is really nice and easy to use for a such complete product. Usually, when you have all those features (ability to drive automated tests, parametrization etc.) this becomes quickly messy. No problem here... it's very clean and nicely designed.