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Qt Licensing

Whitepaper on implications of Qt under LGPL

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ICS, a Qt consultancy in Bedford, MA, has published a white paper by Mark Hatch, the manager of its Qt business, on the implications of Qt being released under the GNU Lesser General Public License, which allows commercial development with the open-source version of Qt as of the release of Qt 4.5. Among its predictions is the proliferation of independent support options and the migration of projects from other toolkits, such as GTK+, to Qt because of its technical superiority. The PDF can be downloaded here.

Qt to be released under LGPL from version 4.5

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Qt Software has announced that Qt is to be released under the LGPL from version 4.5 onwards. The reason is that Nokia is not as reliant on the income from Qt commercial licences as Trolltech was. Nokia will still release Qt under GPL 3 and commercial licences, however. Also see Heise Online with reactions from Mark Shuttleworth (Ubuntu) and Joe Miller (Second Life), Qt Labs blog and the new licensing FAQ, and several recent blog posts by KDE developers. The licensing change affects Qt Creator and the bundled Qt developer tools, but not Qt Extended, i.e. the embedded platform. Qt 4.5 is expected to be released in March.

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