Nokia to Add LGPL to Qt Licensing Model
Today, Nokia announced that Qt framework will be available under open source LGPL from release of Qt 4.5, and it is scheduled for March 2009.
This step will change the way of desktop development. Because Qt has everything which are everybody looks for, cross platform, native code, well designed OO API, powerful IDE (Green House) , good documentation, large community (You know Qt is also used in KDE).
Why LGPL ? Because it is more permissive, and it is primarily used for software libraries. If you use code which is under GPL in your software, you have to make open source your software too. But if you are using code under LGPL there is not a requirement like that. You can still keep your source closed.