Apache Click is a simple JEE web application framework for commercial Java developers. Apache Click is an open source project, licensed under the Apache license . Click uses an event based programming model for processing Servlet requests and Velocity for rendering the response. (Note other template engines such as JSP and Freemarker are also supported) This framework uses a single servlet, called ClickServlet, to act as a request dispatcher. When a request arrives ClickServlet creates a Page object to process the request and th en uses the page's Velocity template to render the results. en uses the page's Velocity template to render the results.