tinyspeck/hammock — pull request #28 by jvandyke (2014-08-13 19:39:03+00:00)
Title: Add a Heroku Button for easy deployments

https://blog.heroku.com/archives/2014/8/7/heroku-button

The only odd this is that the app's URL needs to be set after it's deployed, unless you know you'll be using a DNS and know the address. Not so helpful for quick test deployments.