The VLDocking framework is a commercial-grade Swing Framework providing rich docking features which can easily be integrated with existing applications (and of course new ones).

VLDocking has been created in 2004, and dual licenced (Commercial + GPL) until major release 3, for which the LGPL licensing has been chosen.

VLDocking is used by companies worldwide and open source projets. The product is authored and commercially supported by vlsolutions : http://www.vlsolutions.com/products/docking