This is one of the simplest example with Electron. This app, "Raincast" gets weather info via API, and shows the red icon on the menu bar if it's raining. That's it.

• run npm install
• run npm start to run app from CLI without building Raincast.app

If you have trouble on npm install, try npm install --save-dev electron-prebuilt before that.

• run npm run build to make Raincast.app (in app.zip)