.NET

RestSharprestsharp/RestSharp

A lightweight HTTP API client library for .NET that simplifies REST service consumption.

StockSharpStockSharp/StockSharp

An open-source C# platform for algorithmic trading and quantitative analysis across stocks, forex, crypto, and options markets.

HumanizerHumanizr/Humanizer

A .NET library for manipulating and displaying strings, enums, dates, times, numbers, and quantities in a human-friendly way.

YARPmicrosoft/reverse-proxy

A .NET toolkit for building high-performance, customizable HTTP reverse proxy servers using ASP.NET infrastructure.

Refitreactiveui/refit

A type-safe REST library for .NET that automatically generates HTTP clients from interface definitions.

LiteDBmbdavid/LiteDB

A lightweight, serverless .NET NoSQL embedded database stored in a single data file.

Git Credential Managergit-ecosystem/git-credential-manager

A secure, cross-platform Git credential helper that provides authentication to GitHub, Azure DevOps, Bitbucket, and GitLab.

Aeronreal-logic/Aeron

High-performance messaging system for reliable UDP unicast, UDP multicast, and IPC transport with predictable low latency.

ReactiveUIreactiveui/reactiveui

A composable, cross-platform MVVM framework for .NET that uses functional reactive programming to abstract mutable state from UIs.

ReactiveUIreactiveui/ReactiveUI

A composable, cross-platform MVVM framework for .NET that uses functional reactive programming to abstract mutable state from UIs.

NETworkManagerBornToBeRoot/NETworkManager

An open-source network administration and troubleshooting tool with remote access, diagnostics, and profile management in a unified interface.

Squirrelsquirrel/squirrel.windows

An installation and update framework for Windows desktop apps that works like ClickOnce but better.

Serilogserilog/serilog

A diagnostic logging library for .NET applications with first-class support for structured event data.

MassTransitMassTransit/MassTransit

A free, open-source distributed application framework for .NET that enables message-based, loosely-coupled asynchronous communication.

Stridestride3d/stride

An open-source C# game engine for realistic rendering and VR, featuring a visual editor and cross-platform support.

BTCPayServerbtcpayserver/btcpayserver

A free, open-source, self-hosted Bitcoin payment processor that eliminates intermediaries and fees.

Windows UI Librarymicrosoft/microsoft-ui-xaml

A modern UI framework with rich controls and Fluent Design for building high-performance Windows applications.

UniRxneuecc/UniRx

A reactive programming library for Unity that ports .NET Reactive Extensions with Unity-specific utilities and cross-platform support.

NSwagRSuter/NSwag

A Swagger/OpenAPI toolchain for .NET, ASP.NET Core, and TypeScript that generates specifications and client code.

Rx.NETdotnet/reactive

A library for event-driven programming in .NET using a composable, declarative model for processing live data streams.

Rx.NETReactive-Extensions/Rx.NET

A library for event-driven programming in .NET using a composable, declarative model with LINQ over observable sequences.

NancyNancyFx/Nancy

A lightweight, low-ceremony framework for building HTTP services on .NET and Mono.

CAPdotnetcore/CAP

A .NET library for distributed transactions and event bus integration in microservices using the Outbox pattern.

language-extlouthy/language-ext

A C# functional programming framework that provides monads, immutable collections, effects, and concurrency tools to write declarative, robust code.

HandyControlHandyOrg/HandyControl

A collection of simple and commonly used WPF controls and styles for .NET desktop applications.

MailKitjstedfast/MailKit

A cross-platform .NET library for robust, RFC-compliant IMAP, POP3, and SMTP client communication.

Hazelcasthazelcast/hazelcast

A unified real-time data platform combining stream processing with a fast data store for instant action on data-in-motion.

NLogNLog/NLog

A flexible and structured logging platform for .NET applications, supporting both traditional and modern logging patterns.

NLognlog/NLog

A flexible and structured logging platform for .NET applications, supporting both traditional and structured logging across various platforms.

Lib.Harmonypardeike/Harmony

A library for patching, replacing, and decorating .NET and Mono methods during runtime, enabling non-destructive code modifications.

Moqdevlooped/moq

A friendly and popular mocking library for .NET that leverages LINQ expressions for type-safe and refactoring-friendly unit tests.

moq.netcoreMoq/moq4

A friendly and popular mocking library for .NET that uses LINQ expressions for type-safe and refactoring-friendly unit tests.

Statelessdotnet-state-machine/stateless

A simple .NET library for creating state machines and lightweight state machine-based workflows directly in C# code.

Stack Exchange RedisStackExchange/StackExchange.Redis

A high-performance .NET client for Redis and Redis-compatible servers like Azure Cache, ElastiCache, Garnet, and Valkey.

NAudionaudio/NAudio

A comprehensive .NET audio library for playback, recording, format conversion, MIDI, and audio manipulation.

GraphQL.NETgraphql-dotnet/graphql-dotnet

A .NET implementation of the GraphQL specification for building GraphQL APIs and servers.