WPF and WCF

WPF
The Microsoft Windows Presentation Foundation (WPF) provides the foundation for building applications and high fidelity experiences in UI automation infrastructure, documents, and media content, data driven UI and visualization, as well as the integration points for weaving the application experience into the Windows shell.

WCF
Windows Communication Foundation (WCF) is a technology for building and running connected systems. It is a new breed of communications infrastructure built around the Web services architecture and service-oriented programming, which provides secure, extensible, spanning transports, security systems, reliable, and transacted messaging along with interoperability.