AppCan enhances Prism, better compositing, i.e. Document management , Menu/toolbar merging, local region managers, standardized regions, view model extension.

A framework designed for WPF and Silverlight which implements a variety of UI patterns including MVVM , MVP and MVC. Caliburn is a legacy framework.

Prism provides guidance to design and build rich, flexible, and easy-to-maintain Windows Presentation Foundation and Silverlight.

Waf File Hash Generator is a simple tool to generate the hash values of one or more files. It supports the SHA1 and MD5 hash algorithm.

ShellLight is essentially a graphical shell for Silverlight applications that enables a quick auto-complete launcher for features in your solution.

SuperModel is a dynamic, interface-based View-Model generator. Instead of implementing INotifyPropertyChanged by hand, which can be both tedious and dangerous, SuperModel will dynamically generate an implementation of a view-model based on an interface specification.

The WPF Application Framework (WAF) is a lightweight Framework that helps you to create well structured WPF Applications.

Waf Stopwatch is an advanced stopwatch with a lap recording feature.

Some sample code demonstrating how various GUI architectural patterns can be implementing in WPF.