Generically, open source refers to a program in which the source code is available to the general public for use and/or modification from its original design free of charge, i.e., open. Open source code is typically created as a collaborative effort in which programmers improve upon the code and share the changes within the community. Open source sprouted in the technological community as a response to proprietary software owned by corporations.
Our main focus is PHP, but we also work with other related technologies that make up the web application stack (traditionally LAMP - however the number of tools that are used in modern PHP is far greater than just Linux, Apache, MySQL and PHP). We use a variety of PHP frameworks, depending on the project and have solid experience in Zend Framework, Symfony2, CodeIgniter, and many popular PHP libraries. We also regularly deliver large-scale projects using Wordpress, Magento, Oscommerce, Drupal, Joomla and other open source content management systems.