Flexdock is a java docking framework for use in cross-platform swing applications. it offers features you'd expect in any desktop docking framework such as:
* tabbed and split layouts
* drag-n-drop capability
* floating windows
* collapsible containers to save real estate
* layout persistence
* multi-plaform (fully testing on microsoft windows, many wm of gnu/linux,
mac os x, opensolaris, etc)
* no jni