They also have a Java package with a wealth of image effects, animations and applets for websites and blogs. Though you can preview the content of both packages online, you can also download it directly for free to start learning about how it while using it, and relax: they both run on Windows, Mac and Linux. While using these stuff is free for anyone who cares to download and install them on the corresponding site, it is also true that people clicking in the animations/effects as links will get a credit pop-up; if you want to get rid of them you are probably best advised to purchase the licenses from the site, and note that you will get charged per each domain where you use the packages, so have that information handy beforehand. 