Here are the refactorings available : http://doc.qt.io/qtcreator/creator-editor-refactoring.html

Also they are backed by Clang and muuuuuuuuuuuch faster than in Visual Studio + whatever paid extension

A very nice feature it has and that I didn't see elsewhere is the optional case-sensitive renaming. eg renaming Foo to Bar will also change foo to bar and FoO to BaR.