Which one is the official Qt SDK (C++)?

Question

I found a few websites to download the Qt SDK:

1. Nokia.com
2. Qt-Project.org
3. Digia.com

I can't guess which one is the official SDK. The one from Nokia is even above 1GB, but the one from Qt-Project is only a few hundred MB. And the last one from Digia requires a purchase.

Answer 1

1. Nokia used to own Qt, so that was the official place to get it.
2. qt-project.org is where you will find the open source licensed versions and source code.
3. The commercial part was sold to Digia. If you want a commercial license, that would be your location.

Basically ignore the Nokia stuff now, and choose the appropriate package for your needs, whether it is just the libraries, or the complete SDK including Qt Creator and the extra dev tools.

Answer 2

1. The Qt SDK delivers a complete toolset for Symbian, MeeGo, and desktop apps. It's a bundle package for various platforms. Old versions from Nokia.
2. This is the open source version. Each platform in a different package.
3. This is the commercial version from Digia.com.

If you are using open source, (2) is the official version.