I'm going to make website for nonprofit organization... so which open source is best?? which one is more fast?? your suggestion??
I think you should to try by yourself but Drupal might be strange for who never it before. I like CCK&View in Drupla. It help me create many type of content in same site, example I have "Car" content type and then I can have photo field, price field also add other field without coding.
If u want to make news website Joomla is the best.and the other like communication Drupal is the best.
It depend according your need or requirement , i think joomla is best but wordpress is mostly use today so as compare to Drupal Joomla is best..
As a programmer I would use Drupal, BUT since this is for a nonprofit got with Joomla. I find that nonprofits need to be able to configure things easier without having to pay someone to figure out the more advance things.
I go back in forth on this myself but I would list them in this order; 1. Drupal 2. Wordpress 3. Joomla Try em and get your sandbox on. See what one you like best. The only way you will know is if you do! -MT