Compa is a GNOME panel applet which can display the output of any system command on the panel. It can also display the output of a different command in its tooltip, and launch a different command when clicked. The text style can be modified using the Text Attribute Markup Language.
OrgApp is a Java library to handle and draw organizational charts (organigrams). The library also has an applet and a Swing Java client able to view an organizational chart read from a file, in different formats (one of them based upon XML). The applet supports charts with different layouts and boxes with hyperlinks, customizable colors, sizes, positions, etc., and it is easy to embed it in an HTML page.
JFileUpload is a Java applet that allows you to upload files and folders to any Web or FTP server. It can be integrated into any application. The server-side technology could be JSP/Servlet, PHP, Coldfusion, CGI, or Microsoft ASP. The front-end provides an upload progress bar, a cancel button, and drag and drop support.