Qt 4.5 will be available under the LGPL

I’m on the Qt (owned by Nokia now) mailing list since I have a commercial license for a client project, and I got a very interesting email today, telling me that on its release in March 2009, Qt 4.5 will be available under the LGPL. This is really big news. Up until the current Qt 4.4, your only licensing options are a per-seat and per-platform commercial license (which adds up if you have multiple developers and multiple target platforms, which you will do if you’re using Qt anyway), or alternatively the free option which means you use it under the GPL - meaning all your own code has to also be GPL, with an exception that allows you to publish / use software under other open source licenses too, but nevertheless it all has to be public.

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