title: A completely free agile software process tool
body: <p>I know slightly close questions have been asked before but this question is a bit different.</p>
  
  <p>We are a start-up company with a very limited budget and we are looking for a completely free Agile software development process tool without any limitation on the number of users. We don't want to have a limitation for the number of users because there could be a lot of people who would do small tasks for us and if they pass the number of user limit all of a sudden we'll have to pay a lot of money for the tool monthly.</p>
  
  <p>It would be very useful if it could support:</p>
  
  <ul>
  <li>Kanban board</li>
  <li>Task hierarchy (so that you can define cards within cards)</li>
  <li>Hosting the tool online (not download)</li>
  <li>Commenting system</li>
  <li>Different roles</li>
  <li>Swimlanes</li>
  </ul>
  
  <p>I have checked a lot of those tools here:</p>
  
  <p><a href="http://agilescout.com/best-agile-scrum-tools/">http://agilescout.com/best-agile-scrum-tools/</a></p>
  
  <p>but I didn't find any that is absolutely free for unlimited users. Some of them also don't have a Kanban board. I checked Agilefant but its online version is going to be paid from 2014. I also checked Stackoverflow for this but none of the questions were targeting "completely free tools".</p>
  
  <p>Your help will be greatly appreciated.</p>