5 - Plug-in system for tools
6 - Graphical state machine viewer
7 - Object hierarchy visualization plug-in
8 - New timer profiler plug-in
9 - New locale inspector plug-in
10 - New property view/editor for non-QObject types
11 (e.g. QGraphicsItem and many of its sub-classes)
12 - New widget export actions (image, PDF, SVG, Designer UI file)
13 - New launcher UI with support for starting new processes, self-testing,
14 and a much faster process list on Mac OSX
15 - Support more types in the property editor
16 - Improved widget tree model
17 - Fix unreliable attaching with MSVC