For Mac OS X app for upload your screen on multiple image hosting (chevereto, imgur, zupmage, noelshack).

• nodejs (> 0.11 )

curl -o- https://raw.githubusercontent.com/creationix/nvm/v0.25.4/install.sh | bash
nvm install 0.12 #nvm ls-remote to see available versions
nvm alias default 0.12

npm i pm2 -g

pm2 install upload-screenshot

You has the settings in settings.json Your images is uploaded on http://pix.hydrog3n.fr without API key. Change your screen directory on setting.js by default is /Users/hydrog3n/Pictures

cd ~/.pm2/node_modules/upload-screenshot
cp settings.js.default settings.js
vim settings.js
pm2 restart upload-screenshot

I test my app on Mac OS X (10.10.4). Please if you use an others OS add a new issue with your OS.