title: How to get started with ExtJS?
body: <p>I am beginner to ExtJS technology. I wish to learn it. </p>
  
  <p>But, how should I start it ? </p>
  
  <ol>
  <li>Sencha's price is too high to buy ? </li>
  <li>Is Sencha's tutorial available for free ?</li>
  <li>Is ExtJS needs to be run in a special IDE ?</li>
  </ol>
  
  <p>Thank you</p>