The InfoNode Look and Feel is available under a dual license. We have compiled some questions and answers regarding licencing in our Sales FAQ.

In effect InfoNode's dual licensing strategy says that if you are writing a GPL application use the GPL version of InfoNode Look and Feel, otherwise you must use the version distributed under the InfoNode Software License and purchase one or more developer licenses. You can only purchase InfoNode Look and Feel as part of InfoNode Docking Windows or InfoNode Tabbed Panel.

GNU General Public License (GPL)
The GPL version are distributed to the open source community under the terms of the GPL. This license is intended for developing, building, and distributing open source software. The GPL release of InfoNode Look and Feel allows free software developers to use InfoNode Look and Feel free of charge. Any software produced with the GPL version of InfoNode Look and Feel (and any derivatives of this software) must also be released with full source code available under the GPL.
InfoNode Software License
The InfoNode Software License allows customers to develop and distribute their applications under standard commercial terms for a fee. The commercial license is based on developer license. You may copy and distribute the complete InfoNode Look and Feel as part of InfoNode Docking Windows or InfoNode Tabbed Panel without modifications together with a product if all persons that have developed any part of the product that uses InfoNode Look and Feel directly or indirectly have purchased a developer license for InfoNode Docking Windows or InfoNode Tabbed Panel. Please read the InfoNode Software License for details.