What are good docking frameworks for Java/Swing?

I'm looking for a good lightweight Java docking framework.

I know that Netbeans and Eclipse can be used as RCP, but I'm looking for something a little bit more lightweight.

Swing / AWT frameworks:

• Raven Docking Apache 2; 0.2 MB
• MyDoggy LGPL; only JARs: 0.7 MB; Dec 2010
• VLDocking LGPL; 0.4 MB
• NetBeans CDDL/GPL; 4.6 MB (platform.zip)
• Eclipse CPL or EPL ? only swt (?)
• InfoNode GPL or Commercial
• Sanaware GPL or Commercial full zip 0.3MB
• Docking Frames LGPL; 3 MB
• Jide commercial; <3MB
• FlexDock MIT; 0.4 MB; Nov 2011

JavaFX frameworks:

• TiwulFX-Dock MIT; 22 KB
• DockFX MPL-2.0; 44 KB

Inactive projects

• SwingDocking seems to me fully functional and fast; Apache license 2; Oct 2007
• XUI will be further developed here?; MPL; 1.6 MB (XUI-jdk15.zip); Feb 2008
• JDocking CDDL; 1.3 MB (v0.8.zip) the docking part of netbeans
• JRichClient GPL; derivation of flexdock; Nov 2007