Salt (source code) is a configuration management tool used for application deployment and setting up development environments.
What's new in Salt 3000 Neon covers the latest release and the significant number of new features and fixes contained within it.
Introduction to Salt gives a 30 second summary of what the tool can do for you then provides a collection of links to other resources that plug you into the Salt community, such as the salt-users mailing list and the Salt Stack company blog.
Linode has two great beginner guides to Salt, the first one on Getting Started with Salt - Basic Installation and Setup and the other titled A Beginner's Guide to Salt.