Extended Contacts is a one page web application to manage your contacts or clients. It has filters like in Excel. The communication with the web server is via AJAX requests, so no page loads are required. This application requires web server (such as Apache) capable of running PHP 5.4 or above. It also requires MySQL server. You need to be familiar with PHP and MySQL in order to operate this web application. For development you need to be familiar with Sencha CMD.