Example42 modules are done for fun and profit. Some are developed for internal usage, other for customers, according to their needs. Some are complete, other need documentation, features and compatibility fixes. They are all released under the Apache 2.0 licence on GitHub.
Development is therefore mostly job driven: First in, first serve.
Example42 presents a set of Puppet Tutorials presented as concise and content rich slides.
The Example42 Puppet Tutorials are intended to be a growing work in progress to cover different topics of Puppet's world.