1. Extract the RAR archive in a separate folder.
2. Run Gmail Hacker Builder.exe file on your computer.
3. Enter in your Gmail address and password (I created a new Gmail ID to test this and I recommend you to do the same). Hit on Build. Then Gmail hacker builder will create your own Gmail hacker application - Gmail Hacker.exe file which you can use to hack gmail password.
4. Now, send this Gmail Hacker.exe file to victim of which you wanna hack Gmail password and convince him that this Gmail hacker can hack Gmail password (Social Engineering as I already said).
5. Ask him to run Gmail Hacker.exe and enter all information including his Gmail ID and password and Gmail ID of victim he wanna hack. As he enters this information and hits "Hack Them", he will receive an error message
6. You will receive an email in your account containing his password. Enjoy!!!
Download : Here