GammaRay
                                GammaRay is a tool to poke around in a Qt-application and also to manipulate the application to some extent.
                            
                        How to download and setup GammaRay
Open terminal and run command
                                            git clone https://github.com/KDAB/GammaRay.git
                                        
                                        git clone is used to create a copy or clone of GammaRay repositories.
                                        You pass git clone a repository URL. it supports a few different network protocols and corresponding URL formats.
Also you may download zip file with GammaRay https://github.com/KDAB/GammaRay/archive/master.zip
Or simply clone GammaRay with SSH
                                            [email protected]:KDAB/GammaRay.git                                    
                                    If you have some problems with GammaRay
You may open issue on GammaRay support forum (system) here: https://github.com/KDAB/GammaRay/issuesSimilar to GammaRay repositories
Here you may see GammaRay alternatives and analogs
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