Fluent Assertions is a set of .NET extension methods that allow you to more naturally specify the expected outcome of a TDD or BDD-style test. We currently use it in all our internal and client projects, and it is used in many open-source projects. It runs on .NET 3.5, 4.0 and 4.5 (Desktop and Windows Store), Silverlight 4 and 5 and Windows Phone 7.5 and later. It supports the unit test frameworks NUnit, XUnit, MBUnit, Gallio, NSpec and MSpec.

flipfam

A fluent api for the php dom extension

Fluent Security configuration for ASP.NET MVC

Recursive descent LL(k) parser for .NET with Fluent API, BNF, EBNF and Gold Grammars

A fluent API to FFMPEG (http://www.ffmpeg.org)

A set of extension to the CRM SDK to enable a more fluent interface.

Azure Fluent Management

An Endosymbiotic Facultative Semantically Clean Fluent Interface Test Framework