Open Source: WCF

WCF is Open Source @ InfoQ

"The .NET Foundation has just announced the release of Windows Communication Foundation (WCF) as open source. WCF, originally offered in .NET 3.0, offers a high-level abstraction over cross-application communication. It supports one-way and two-way messages over HTTP, TCP, named pipes, and, with third-party extensions, any other message based wire format.

...supports the ability to use WCF in both Universal Windows and ASP.NET 5 applications.

...Everything you need for basic one-way communication over HTTP or TCP is in place. Two-way communication, web sockets, and various security features such as SSL are still a work in progress."