AWSBox
DIY Platform-as-a-Service tool specialized for NodeJS projects with AWS as the backend, and created by Mozilla
linux open-source cloud-paas nodejs
Buildstep
Buildstep uses Docker and small buildpack scripts to build applications like Heroku. It was used by Dokku to create a 100-line Heroku clone. There are many open source Buildpack scripts for various languages like Java, Ruby, Erlang, PHP, etc.
linux open-source cloud-paas ruby