Introduction:
There are many .NET open source projects on Internet but you can find major open source projects collectively on GitHub which are provided by Microsoft and the community, including many that are part of the .NET Foundation.
From the above link you can find different categories and different projects with short description which are ordered by alphabetically. Some of the Projects are
- .NET Core - Core .NET Framework
- Mono Project - Cross-platform implementation of .NET Framework.
- Dynamic Language Runtime - A toolkit for building dynamic languages for .NET.
- DNN (formerly DotNetNuke) - Web content management platform (CMS).
- Umbraco - Web content management platform (CMS).
- System.Data.SQLite - SQLite ADO.NET provider
- Coding4Fun Toolkit
- JSON.NET - Popular high-performance JSON framework for .NET
- MVVM Light Toolkit
- NUnit - NUnit is a unit-testing framework for all .NET languages.
- NHibernate - Object Relational Mapper
References