We have built Web Application using variety of technologies like PHP, Wordpress, Java & .NET. For some time now we have been concentrating on open source technologies and in this initiative we have built many Web Applications using:
Backend: PHP, PHP Frameworks like Laravel, Zend, CodeIgnitier
Frontend: jQuery, AngularJS
Databases: MySQL, MongoDB
Mobile: Ionic Framework
CMS: Wordpress Themes, Wordpress Plugins.