The Smart Client Software Factory (SCSF) is a guidance offering that provides architecture guidance to help developers build Composite Smart Clients using the Microsoft platform.
From the SCSF homepage on CodePlex:
The Smart Client Software Factory is a guidance offering that provides comprehensive architecture guidance to help customers build Composite Smart Clients using the Microsoft platform (Win Forms, WPF, etc). An SCSF solution is composed of a number of discrete, independent, yet functional assemblies and components. These pieces are dynamically loaded and integrated together at runtime within a shell to form a fully coherent application.