What is the best platform to develop a website ?
I am asking in reference with the apps like WordPress, Drupal, Joomla etc.
Depend which you want to do and of course tour knowledge. WordPress is easier and has a great community and support, Joomla I think is not easier than WordPress but all time has many security holes. Drupal is more difficult but very complete.
yes Wordpress is still the best !!!
Brackets an IDE application where you code it. And using any webhosts upload your website
You can found some useful informations in http://www.websitenews.org/