BrainCode has Java Applets for you. All versions, Free or Professional, come with complete download kits. Professional Versions are conservatively priced, and an excellent value for both commercial developers and those serious about private site development. Solid, quick, professional e-mail support is included. There are also completely Free Versions for our many friends with private and non-profit sites.
Free versions require no keycode of any kind.
Note, though, that free versions are not supported. Those who like to try applets before they buy will also appreciate the free downloads. Other than a brief notice, they function identically to the purchased versions.