OpenShift is a Platform as a Service, similar to Heroku. They allow you to easily deploy your applications by taking care of provisioning your environments with the necessary dependencies and setting them up to scale if necessary.

Also, like Heroku, OpenShift has a free tier, which allows you to run an application for free, with some restrictions. They also offer a library of integrated services that you can easily setup to work with your application, like a managed Postgres database, or Redis cache.