Wowfunhappy made some aesthetic changes to this app for personal use. YOU MOST LIKELY WANT THE ORIGINAL VERSION, NOT MY FORK. The original readme is below:

A pebble app that allows you to execute remote files from your pebble. The app needs a companion app, server, to be running on your local network and to be accessible via HTTP.

The number of files that you can execute is not limited, and you also get visual feedback in form of message. The message contains whatever was written to stdout or stderr.

When adding new script, you don't need to change the pebble app or server in any way, just add a new executable to scripts/ directory of the server and the file will appear in menu when you restart the pebble app.

You can run the server on your laptop, Raspberry Pi or whatever. You can also write you own server. Read more here about how to setup the server and what API should be provided in order to work with Exec File pebble app.