I work at digiPlant.se as a Interaction Designer / System developer.
Some of the stuff I use: Html5 CSS jQuery AngularJS
Play Framework Symfony2 Episerver Wordpress
It all depends on what the customer needs or wants.
Q&A for professional and enthusiast programmers
Q&A for computer enthusiasts and power users
Q&A for user experience researchers and experts
Q&A for professional system and network administrators
Q&A for programming puzzle enthusiasts and code golfers