I'm developing an application and I want to have multiple internal windows (something like JInternalFrames added to a JDesktopPane). I would like to know if there are components ready to do that or if I will need to develop my our components.
If anyone knows about tutorials, links, posts, suggestions, etc. about that and could share it here, I would be very thankful.
JavaFX doesn't have an equivalent of JDesktopPane. There is a feature request for such a beast (see: http://javafx-jira.kenai.com/browse/RT-14039). If you're looking for an application platform that offers docking windows and other app lifecycle management feature then there are two projects that you might want to take a look at:
One based on the Netbeans platform:
Another based on the Eclipse platform: