.NET debugger and assembly editor

A wrapper executable that can run any executable as a Windows service, in a permissive license.

Powerful .NET library for benchmarking

.NET (WPF and Windows Forms) bindings for the Chromium Embedded Framework

PerfView is a CPU and memory performance-analysis tool

Source from the Microsoft .NET Reference Source that represent a subset of the .NET Framework

A simple but effective mini-profiler for ASP.NET (and Core) websites

Build Cross Platform HTML Desktop Apps on .NET using native GUI, HTML5, JavaScript, CSS, Owin, AspNetCore (MVC, RazorPages, Blazor)

A modern file tail utility based on Rx.Net which show cases reactive programming and Dynamic Data (see https://github.com/RolandPheasant/DynamicData)

Microsoft Graph Engine

Fast .NET JSON (De)Serializer, Built On Sigil

A library to provide pooling for .NET MemoryStream objects to improve application performance.

Coyote is a library and tool for testing concurrent C# code and deterministically reproducing bugs.

An ASP.NET Core blogging engine

A .NET library for carefully refactoring critical paths. It's a port of GitHub's Ruby Scientist library

Microsoft.Diagnostics.Runtime is a set of APIs for introspecting processes and dumps.

A fail-fast validating helper for .NET CIL generation

A SMTP Server component written in C#

Linq-like extension functions for Arrays, Span<T>, and List<T> that are faster and allocate less.

Get SQL Server notification on record table change

Fixed point math C# library

Bindings and ADO.NET Provider for DuckDB

ApprovalTest verification library for .Net

Managed Extensibility Framework (MEF) implementation used by Visual Studio

Assists in performing Roslyn-based code generation during a build.

JSON library for .NET 2.0+/SL4+/WP7/WindowsStore with optional support for dynamic and DataContract

LZ4 - ultra fast compression algorithm - for all .NET platforms

LibZ, the alternative to ILMerge

The .NET port of HdrHistogram