
The RabbitMQ .NET client is an open-source implementation of an Advanced Message Queuing Protocol (AMQP) client library for C# and other .NET languages. RabbitMQ .NET is also an API that exposes AMQP services via Microsoft’s Windows Communication Foundation (WCF).
RabbitMQ is based on a proven platform and offers a reliable, highly available, scalable and portable messaging system with predictable and consistent throughput and latency.
RabbitMQ .NET Homepage

The Android-to-Windows-Phone-7 API free mapping tool helps developers find their way around when they discover the Windows Phone platform. This is like a travel dictionary that helps Android developers translate their Android app code to Windows Phone. Developers can quickly find equivalent classes, methods, and events in WP7, along with sample C# code and API documentation for both platforms.
Android-to-WP7 Mapping Tool
WP7 Guide for Android Developers

The iPhone/iOS to Windows Phone 7 API free mapping tool helps developers find their way around when they discover the Windows Phone platform. This is like a travel dictionary that helps iPhone developers translate their iOS app code to Windows Phone. Developers can quickly find equivalent classes, methods, and events in WP7, along with sample C# code and API documentation for both platforms.
iOS->WP7 Mapping Tool
Related Story: Microsoft Hoping to Lure Developers to Windows Phone 7
OWIN (Open Web Interface for .Net) defines a standard interface between .NET web servers and web applications. The goal of the OWIN interface is to decouple server and application, encourage the development of simple modules for .NET web development, and by being an open standard, stimulate the open source ecosystem of .NET web development tools.
OWIN is neither framework nor server. It is an interface through which which servers and frameworks or applications can communicate with each other. OWIN is defined by three core interfaces: IApplication, IRequest, and IResponse. Broadly speaking, hosts provide application objects with request objects, and application objects provide response objects back to the server.
OWIN 1.0 Draft
Google Translate API for .NET is an open-source project that provides a simple, unofficial, .NET Framework API for using Google Ajax Search API service. Features include:
- Support all 8 Google Search APIs.
- CLS compatible. It can be used by any .NET languages (C#, VB.NET, F#, C++/CLI etc.)
Alpha version 0.4 is now available.
Google Translate API for .NET