Introduction - If you have any usage issues, please Google them yourself
In this version of Qt 5, Qt Quick became the core of Qt. However, Qt 5 continues to provide powerful local C++ capabilities for better user experience and provides full support for graphics acceleration in OpenGL/OpenGL ES.
Qt 5 is the first major change since the release of the Qt 4.x Series in 2005. This change is mainly to make Qt more adapted to future needs.
Qt 5 releases a full SDK that covers Windows, Mac, OS, X, and Linux. This shows that the contents of Qt 5 release include: Qt 5 framework, IDE (Qt Creator), examples and documents.