dotnet/dotnet-projects.md

# .NET Projects

There are many .NET open source projects. You can always use a search engine to find projects, and that's a good approach. This list is an intended to provide a showcase for projects that want it. It is itendeded to be community maintained. PR a change in and it will be accepted (modulo duplicates). Projects should be sorted alphabetically and GitHub links are preferred.

* Platforms
 * [.NET Core](https://github.com/dotnet/core)
 * [Castle Project](https://github.com/castleproject)
 * [Cosmos](http://cosmos.codeplex.com/)
 * [Mono Project](https://github.com/mono/)
 
* Languages
 * [IronScheme](http://ironscheme.codeplex.com)
 * [Nemerle](https://github.com/rsdn/nemerle) A high-level statically-typed programming language which offers functional, object-oriented and imperative features and has a simple C# like syntax and a powerful meta-programming system.

* Security / Identity Management
 * [Thinktecture IdentityServer](https://github.com/thinktecture/Thinktecture.IdentityServer.v3)
 * [Thinktecture IdentityManager](https://github.com/thinktecture/Thinktecture.IdentityManager)

* Web CMS
 * [DNN (formerly DotNetNuke)](https://dotnetnuke.codeplex.com/)
 * [Orchard](http://www.orchardproject.net/)
 * [Umbraco](http://umbraco.com/)
 * [Suave](https://github.com/SuaveIO/suave) A lightweight web server and a set of combinators to manipulate route flow and task composition.
 * [WebSharper](https://bitbucket.org/IntelliFactory/websharper)  Web programming platform including a compiler from F# code to JavaScript.

* Web Frameworks
 * [Nancy](http://nancyfx.org)

* ADO.NET providers
 * [Npgsql] (https://github.com/npgsql/npgsql) PostgreSQL 
 * [Firebird .NET client] (https://sourceforge.net/p/firebird/NETProvider/) Firebird
 
* Libraries
 * [Algorithmia] (https://github.com/SolutionsDesign/Algorithmia) Algorithms and Data structures
 * [AngleSharp](https://github.com/FlorianRappl/AngleSharp)
 * [ArcGIS.PCL](https://github.com/davetimmins/ArcGIS.PCL)
 * [AzureNetQ](https://github.com/Roysvork/AzureNetQ)
 * [Cimbalino](http://cimbalino.org/)
 * [Coding4Fun Toolkit](http://coding4fun.codeplex.com/)
 * [ColoredConsole](https://github.com/colored-console/colored-console)
 * [DotNetOpenAuth](https://github.com/DotNetOpenAuth)
 * [EasyNetQ](https://github.com/mikehadlow/EasyNetQ)
 * [FluentBootstrap](https://github.com/somedave/FluentBootstrap)
 * [FluentValidation](https://github.com/JeremySkinner/FluentValidation)
 * [ImageProcessor](http://imageprocessor.org/)
 * [JSON.NET](http://json.net/)
 * [Kentor.AuthServices](https://github.com/KentorIT/authservices) A SAML2 Service Provider for .NET.
 * [LibGit2Sharp](http://libgit2sharp.com/)
 * [Math.NET Numerics](http://numerics.mathdotnet.com/) Provides methods and algorithms for numerical computations in science, engineering and every day use.
 * [NetTopologySuite](https://github.com/NetTopologySuite) A .NET port of the JTS Topology Suite.
 * [NodaTime](http://nodatime.org/)
 * [OsmSharp](https://github.com/OsmSharp) Mapping & Routing library.
 * [PocketSharp](https://github.com/ceee/PocketSharp)
 * [RestSharp](http://restsharp.org/)
 * [SharpDX](https://github.com/sharpdx/SharpDX)
 * [SharpMap](https://sharpmap.codeplex.com/) An easy-to-use mapping library for use in web and desktop applications
 * [Splat](https://github.com/paulcbetts/splat)
 * [WpfToolkit](https://github.com/dotnetprojects/wpftoolkit)
 * [DiffSharp](http://gbaydin.github.io/DiffSharp/) Automatic Differentiation Library
 * [Cricket](http://fsprojects.github.io/Cricket/)  Actor library
 * [NetTopologySuite](https://github.com/NetTopologySuite/NetTopologySuite/)  A .NET GIS solution that is fast and reliable for the .NET platform

* Mvvm
 * [Caliburn Micro](http://caliburnmicro.com/)
 * [Catel](http://catelproject.com/)
 * [MVVM Cross](https://github.com/MvvmCross/MvvmCross)
 * [MVVM Light Toolkit](http://www.mvvmlight.net)
 * [Radical](https://github.com/RadicalFx/radical)
 * [ReactiveUI](https://github.com/reactiveui/ReactiveUI)
 * [Simple Mvvm Toolkit](http://simplemvvmtoolkit.codeplex.com/)

* Tools
 * [Fody](https://github.com/Fody/Fody)
 * [FsharpLint](http://fsprojects.github.io/FSharpLint/) Lint tool for F#.
 * [FsPickler](http://nessos.github.io/FsPickler/) Serialization library that facilitates the distribution of .NET objects.
 * [GitVersion](https://github.com/ParticularLabs/GitVersion)
 * [LibGit2Sharp](https://github.com/libgit2/libgit2sharp)
 * [Glimpse](http://getglimpse.com)
 * [ILSpy](http://ilspy.net/)
 * [Mini Profiler](http://miniprofiler.com/)
 * [Protobuf-net](https://code.google.com/p/protobuf-net/)
 * [scriptcs](http://scriptcs.net/)
 * [Snoop Wpf](https://github.com/cplotts/snoopwpf)
 * [Sql Bulk Copy Sync](https://github.com/WCOMAB/SqlBulkSync)
 * [FsEye](http://www.swensensoftware.com/fseye) A visual object tree inspector for the F# Interactive.
 * [FAKE](http://fsharp.github.io/FAKE/) Build automation system with capabilities which are similar to make and rake.
 * [Paket](http://fsprojects.github.io/Paket/) Dependency manager for .NET and Mono projects, which is designed to work well with NuGet packages and also enables referencing files directly from GitHub repositories.
 * [Vagrant](http://nessos.github.io/Vagrant/) Automated dependency resolution and dynamic assembly compilation framework.

* Testing
 * [canopy](http://lefthandedgoat.github.io/canopy/) A web testing framework.
 * [FakeItEasy](https://github.com/FakeItEasy/FakeItEasy)
 * [FsCheck](https://fsharp.github.io/FsCheck/) A tool for testing .NET programs automatically.
 * [moq](https://github.com/Moq/moq4)
 * [NSubstitute](http://nsubstitute.github.io/)
 * [NUnit](https://github.com/nunit/nunit)
 * [tickspec](http://tickspec.codeplex.com/) A lightweight Behaviour Driven Development (BDD) framework.
 * [xUnit](https://github.com/xunit/xunit)

* Dependency Injection
 * [Autofac](http://autofac.org/)
 * [Funq](https://funq.codeplex.com/)
 * [Ninject for Desktop](http://www.ninject.org/)
 * [Ninject for Portable Class Libraries, Universal apps and Xamarin](https://github.com/onovotny/ninject)
 * [TinyIoC](https://github.com/grumpydev/TinyIoC)

* Data Access
 * [Dapper](https://github.com/StackExchange/dapper-dot-net)
 * [NHibernate](https://github.com/nhibernate)
 * [Simple Data](https://github.com/markrendle/Simple.Data)
 * [Sqlite-net](https://github.com/praeclarum/sqlite-net)
 * [NMEA Parser](https://github.com/dotMorten/NmeaParser)
 * [StackExchange.Redis](https://github.com/StackExchange/StackExchange.Redis)  
 * [SQL LocalDB Wrapper](https://github.com/martincostello/sqllocaldb)

* Games
 * [MonoGame](http://monogame.net)
 * [Paradox](https://github.com/SiliconStudio/paradox)

* Control libraries
* [Callisto](https://github.com/timheuer/callisto)
 
* Windows Services
 * [TopShelf](https://github.com/Topshelf/Topshelf) 

* Scheduling
 * [Quartz.Net](https://github.com/quartznet/quartznet) 

 
 
This list is just a starting point - also take a look at all the projects on [CodePlex](http://www.codeplex.com/) and on [GitHub Trending C#](https://github.com/trending?l=csharp).

Thanks to @slodge for providing the initial list.

@quozd hosts an [Awesome .NET!](https://github.com/quozd/awesome-dotnet) list. Also worth checking out.