TrelloWorld is a web service that allows you to automatically add comments to Trello cards when you push code to GitHub. It is designed to be run as a free Azure website.
For example this commit comment:
Made flux capacitor more efficient.
Flux capicitor only needs 1.12 gigawats
Trello(YL2Iyg4I)
Wold result with this comment on your Trello card;
Installation instructions can be found on the wiki