Most of our web application development is in the LAMP environment (Linux/Apache/MySQL/PHP), but we also develop in .NET, JSP and Perl.
Applications recently developed vary from writing bespoke modules for Drupal, writing an API for a PHP system to allow data interchange with third party .NET application and a PHP website for managing theatre performance reviews.
We develop in-house, and pride ourselves in being able to deliver extremely cost-effective and high quality applications on-time and on-budget.