Hammer UI Kit (HUK) for WPF is a collection of WPF custom controls. They are designed to help you to create complex applications with less development. Controls provide you rich functions and highly customizations, use default WPF design and layout to decrease integration-time.
HUK is separated into several libraries to minimize needed references, you only need to include what you really use. It is free from any 3rd party references, uses standard .NET components and libraries only (or other HUK control).
There is at least one sample application for every control to demonstrate usage and functionality. Documentation also explains the basics and might shows some code snippet.