ShareX by Tanner Reynolds but windows ready.
All that I did to the source code was remove everything exept src and package.json, then I put the package.json in the src folder.
The first thing you need is Node.js
Then download this,run the ShareX.exe extract it then cd into the folder, do npm install, then you can do node index.js.
Then you are done, you can adjust all the settings in config.json!