Applets are almost forgotten now (at the JavaONE there was a first comeback) but there are still some killer apps, which can be hardly implemented with DHTML (AJAX) or other browser based technologies. The screen capturing software http://www.screencast-o-matic.com/ is free and applet-based. The benefit - you do not have to install software on your machine to capture the screen (not necessarily a browser-window). Currently only .mov exports are supported. To try it out, just click the "create" button on the website. It's amazing - and well done.