Zend Framework for PHP also CodeIgnighter

Mainly Groovy on Grails, with some plain old fashioned Java here and there. Will probably be exploring some possible usage of Clojure or Scala in the near future.

Javascript and Node.js

Plain old PHP, MySQL, Javascript and AJAX.

Mainly CodeIgniter for PHP and some Node.

Wordpress - for content management stuffs

CodeIgniter - web app development

Javascript, jQuery for interactivity and AJAX

Python, Django and GAE.

Depending on the site, Ruby, Drupal or WordPress.

Python, Flask, Javascript (including Node.js)

Ruby on Rails

hmm i think you should try google trends to see which is the most best language for web development that is trending.

Not really. If you're doing something nobody else does, maybe the best tool for it is something nobody else uses.