Qt had been available under the LGPL since 2009. Up until 2005 or so Qt had indeed a relatively complex licensing scheme where the available (i.e. the license

Qt had been available under the LGPL since 2009. Up until 2005 or so Qt had indeed a relatively complex licensing scheme where the available (i.e. the license of Qt) and compatible (i.e. the license of the application, due to their GPL exception allowing applications to use MIT, BSD, ...) differed by what was then Qt ports (e.g. Qt/X11, Qt/OSX, Qt/Windows). After that they always had a uniform licensing model for Qt, were the licensing was independent of the platform.