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HiveBoard is an open source shared graphical whiteboard application that is targeted at professional meetings. It includes interactive chat. It is written in Java and requires a Servlet Container (eg jakarta Tomcat) and a DBMS (eg MySQL) for the server.
A Webcam application, consists of an application that connects to the camera, a Servlet that receives the images, an Applet that displays the video and a simple client for FTP upload.
...Supports Roster, Chat, Message, MUC( Groupchat ), Discovery and File Transfer. All are in one window, no popup except outside link/resource. Simple, easy and functional are law. In Java with Servlet.