I am learning Zendframework . When you are working on some frameworks you need a good IDE ( Integrated Development Environment ) . There are many IDE's that are opensource and properitery . I was using Aptana once and then jumped to Eclipse . Recently I got a Zendstudio i5 licence . I was very Happy to see the Zendstudio licence.  If they have not given me a licence I may not be able to buy one too . I don't earn that much money a month lol .