Simlink is a link between the leJOS firmware and the Rossum Project, allowing you to visualize robots on your PC.
Look at the screenshots page to see what the current build looks like, and what the current stable download looks like too.
On the Robots and Floor plans pages, you can upload your own Rossum robots and floor plans, as well as download ones others have uploaded. This is all dynamically generated, so you can see your uploaded in a matter of seconds.
Links shows many leJOS specific sites, as well as
some other sites that are not related to leJOS, but
have helped me in some way.