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v5.4 [Dec 15, 2014]
Added Modules
- Qt WebChannel
- Qt WebEngine
- Qt WebEngine Widgets
- Qt Platform Headers
Supported Platforms
- WinRT now a supported platform
- Windows Phone 8.1 minimum supported version
Added Classes and Functions

v5.2 [Nov 3, 2013]
Qt 5.2 introduced new iOS and Android ports, as well as a hefty amount of other new functionality. Based on the feedback received from the Qt Enterprise and Qt Mobile customers as well as the whole Qt community, Qt 5.2.1 is providing many improvements.
The most notable improvements in Qt 5.2.1 are numerous JavaScript and QML specific performance optimisations in the new Qt Quick Engine. Other major enhancements are:
+ Qt Quick Controls that were introduced for desktop in Qt 5.1 have been enhanced with a lot of improvements and a couple of new control types.
+ Accessibility is now fully supported on all desktop platforms (including Android).
+ APIs to integrate better with native Windows code have been added to Qt Windows Extras
+ Improved time zone and locale support by means of QTimeZone and QCollator
+ Qt Widgets have been improved with multiple enhancements and a completely new class: QKeySequenceEdit

v5.1 [May 15, 2013]
Qt 5.1 is the latest release of the cross-platform C Application and UI framework. Qt 5.1 solidifies the modern multi-platform way of writing applications with Qt 5 by adding more flesh to the bone by boosting the UI technology and performance. You can now create native Qt-based cross-platform applications all with one framework and target all the most popular operating systems on desktop, embedded and mobile.

v5.0 [Dec 15, 2012]
Qt 5.0 is a major overhaul over the Qt 4.x series that have been around since 2005. We have invested lots of time and effort to make Qt fit for the future.
Qt 5.0 comes as a full SDK package with binaries for Linux (64 and 32 bit), Mac OS X (10.7 and 10.8) and Windows. This implies that in addition to the Qt 5 frameworks, the packages come with Qt Creator 2.6, examples and full documentation.