Clone and run to get the trello app on your desktop.
See instructions here https://madole.github.io/trello-desktop/
or
To clone and run this repository you'll need Git and Node.js (which comes with npm) installed on your computer. From your command line:
# Clone this repository
git clone https://github.com/madole/trello-desktop
# Go into the repository
cd trello-desktop
# Install dependencies and run the app
npm install && npm start
Disclosure
This is a simple electron wrapper around Trello.com
I was finding that I kept closing my browser or the trello tab during development. I needed trello to run on my desktop like an app and it didn't exist. I remembered electron can do this so I've set it up to point at trello.com/login and off I go.