Jing is a Screencasting tool that is easy to install and free to use but limited to 5 minutes of capture time. Its main avantage is that its very easy to use, includes audio capture as well as video capture and generates flash videos. To find out more about Jing, I suggest that you watch the getting started videos at the Jing Help Centre. If you want to do more more with Jing, Jing Pro provides video upload to YouTube and Vimeo for $14.95 per year and Camtasia Studio is Jing's big brother: a professional screencapture and post production tool that is available on a free trial and has a $189 education pricetag.