A simple ASP.NET MVC implementation of the NuGet back-end gallery and web APIs.

NHibernate is a mature, open source object-relational mapper for the .NET framework. It is actively developed, fully featured and used in thousands of successful projects.

Fluent Migrator is a migration framework for .NET much like Ruby Migrations.

Incredibly simple real-time web for .NET

Nancy is a lightweight, low-ceremony, framework for building HTTP based services on .Net and Mono

git-tfs is a two-way bridge between TFS and git, similar to git-svn.

A GitHub API client library for .NET

The AWS SDK for .NET enables .NET developers to easily work with Amazon Web Services.

LibGit2Sharp brings all the might and speed of libgit2, a C native Git implementation, to the managed world of .Net and Mono.

This SDK allows you to build Windows Azure applications that take advantage of Azure scalable cloud computing resources.

A strongly typed elasticsearch .NET client

The .NET framework. Recently open sourced by Microsoft.

The open-source, functional database with Complex Event Processing in JavaScript.

The open-source, functional database with Complex Event Processing in JavaScript.

Cake (C# Make) is a cross platform build automation system.

Humanizer meets all your .NET needs for manipulating and displaying strings, enums, dates, times, timespans, numbers and quantities.

The package manager for Windows

Orleans - Distributed Virtual Actor Model

A cross-platform library for the processing of image files; written in C#

Binding business requirements to .Net code