Drupal is open source and we prefer to work on this & related technologies. World of Open source technologies is unlimited.
Open-source software are software products “available with its source code and under an open-source license to study, change, and improve its design. As a Digital Agency we Support for Open Source IT Application and Software Development in North Web Studio. That is the reason for choosing PHP/MySQL Technologies as core for web development. To widely support Open Source at North Web Studio we provide training programs for Open Software Learning