Selling blazing fast universal checker with a lot of modules! Look at the title ^^
https://rocketr.net/buy/5d808854cc11.
Lifetime updates and more modules to be added.
I confirm that I received a vouch copy from OP and I'm here to give my honest review about his tool.
The tool is an executable with 3 .dll files (which are as far as I know to make the METRO theme for the application as It looks good) , It's user friendly and couldn't be easier to use , you basically write a list of usernames save them on a .txt and import them to the tool and hit "START" , the program will do the rest and check If those usernames are taken or free to use in different websites (PSN , YouTube , STEAM ,Minecraft etc... ).
I personally had issues with Steam one but OP promised to update the modules and fix it , I checked the other options and they seem to work fine.