jpatte 

A simple wrapper around RestSharp and Json.NET, designed to ease the writing of requests to REST APIs while taking care of errors management and tracing.

The Exchange Web Services (EWS) Managed API provides a .NET Framework interface to EWS in Exchange Online, Exchange Online as part of Office 365, and versions of Exchange starting with Exchange Server 2007... More information

A lightweight state machine implementation.

Additional features to Taste.Core, especially helpful for WPF and Silverlight applications.

A client library for LicenceToBill's REST API.

Simple trace writer implementations for Salience.FluentApi.