Hi Deleaker, 

I am an author of Deleaker. Deleaker is a tool to find all kinds of leaks: memory leaks, GDI, handles leaks and others.

While Deleaker is available as a standalone application, it can be used as a plugin in popular IDE: Visual Studio, RAD Studio (Delphi / C++ Builder), and it's time to support Qt Creator.

Here the official announcement.

Look how it works!

Download Deleaker, run the installer. It detects installed Qt Creator versions:

Run Qt Creator, now you have Deleaker there:

Add a leak:

Start debugging, close the window and you get list of leaks:

I hope you will find Deleaker useful, thank you!