Heroku

PaaS vendor.

Owned by SalesforceCom since Dec'2010.

http://en.wikipedia.org/wiki/Heroku

Originally focused on Ruby On Rails, but adding support for other languages: 2011-10-01-HerokuAddsPythonDjango.

"Managing multiple Deployment Environment-s"

Twelve Factor App Configuration Management in Heroku: http://stackoverflow.com/questions/11335444/managing-config-in-12-factor-applications

https://devcenter.heroku.com/articles/development-configuration

Pushing Flask app changes to staging Deployment Environment in Heroku