Jing Project is a free tool for both Mac and Windows users, that lets you capture your computer screen as a static image or a screencast, and then share your screen capture as a URL. Which means that not only are they providing the software to create the capture, they are also providing free hosting. How could you use this? It’s up to you. Add your Jing captures to your chats, your social networking, or your websites. Use to for fun, or to demonstrate computer stuff to friends and co-workers.