.NET Standard 2.0

Prismprismlibrary/prism

A framework for building loosely coupled, maintainable, and testable XAML applications across multiple .NET platforms.

MessagePack-CSharpneuecc/MessagePack-CSharp

Extremely fast MessagePack binary serializer for C# with LZ4 compression, optimized for .NET, Unity, and Xamarin.

AngleSharpAngleSharp/AngleSharp

A .NET library for parsing HTML5, SVG, MathML, and CSS with a standards-compliant DOM.

Silk.NETdotnet/Silk.NET

High-speed .NET bindings for OpenGL, Vulkan, DirectX, and other multimedia, graphics, and compute APIs.

Jintsebastienros/jint

A JavaScript interpreter for .NET that runs on any modern .NET platform, enabling JavaScript execution within .NET applications.

Puppeteer Sharphardkoded/puppeteer-sharp

A .NET port of the official Node.js Puppeteer API for headless browser automation.

FusionCachejodydonetti/ZiggyCreatures.FusionCache

A fast, robust hybrid cache for .NET with advanced resiliency features like fail-safe, cache stampede protection, and multi-level caching.

Telegram.BotTelegramBots/Telegram.Bot

A .NET client library for building Telegram bots, providing full API coverage and extensive testing.

FastReportFastReports/FastReport

Free open-source reporting tool for .NET applications that generates document-like reports from various data sources.

Rebusrebus-org/Rebus

A lean service bus implementation for .NET that enables asynchronous communication in microservices following the 'smart endpoints, dumb pipes' principle.

MicroChartsmicrocharts-dotnet/Microcharts

A simple, cross-platform charting library for .NET built on SkiaSharp.

.NEXT Raftdotnet/dotNext

A high-performance .NET library suite for low-allocation scenarios like microservices, distributed systems, and database engines.

Enums.NETTylerBrinkley/Enums.NET

A high-performance, type-safe .NET utility library for enum operations, solving limitations of System.Enum.

mockhttprichardszalay/mockhttp

A testing layer for Microsoft's HttpClient library that creates canned responses using a fluent API.

RazorLighttoddams/RazorLight

A .NET template engine using Microsoft's Razor parsing engine for building templates from files, embedded resources, strings, or custom sources outside of ASP.NET MVC.

NJsonSchemaRSuter/NJsonSchema

A .NET library for reading, generating, and validating JSON Schema draft v4+ schemas, with code generation for C# and TypeScript.

Stripe.Netstripe/stripe-dotnet

The official Stripe .NET library for integrating Stripe's payment and financial services into .NET applications.

FAKEfsharp/FAKE

A cross-platform build automation system using F# for succinct, typed, and declarative build scripts.

WTelegramClientwiz0u/WTelegramClient

A C#/.NET library for interacting with Telegram's MTProto API, enabling programmatic user account control and full client functionality.

SmartFormataxuno/SmartFormat

A lightweight C# text templating library with named placeholders, lists, localization, and pluralization.

SmartFormat.NETscottrippey/SmartFormat.NET

A lightweight C# text templating library with named placeholders, lists, localization, and pluralization.

Fellow Oak DICOMfo-dicom/fo-dicom

A cross-platform .NET library for reading, writing, and communicating with DICOM medical imaging files and services.

ProxyKitdamianh/ProxyKit

A toolkit for creating code-first HTTP reverse proxies as middleware in ASP.NET Core applications.

posetonerdo/pose

A .NET library that replaces any method (including static and non-virtual) with a delegate at runtime using managed code.

MetadataExtractordrewnoakes/metadata-extractor-dotnet

A .NET library for extracting Exif, IPTC, XMP, ICC, and other metadata from image, video, and audio files.

ReactivePropertyrunceel/ReactiveProperty

A .NET library providing MVVM and asynchronous support features using Reactive Extensions for WPF, WinUI, MAUI, and Blazor.

log4netapache/logging-log4net

A versatile, feature-rich, and efficient logging API and backend for .NET applications.

Spring.Netspring-projects/spring-net

A comprehensive .NET application framework providing dependency injection, AOP, data access, web frameworks, and enterprise integration.

Catalystcuriosity-ai/catalyst

Catalyst is a high-performance C# NLP library inspired by spaCy, offering pre-trained models, entity recognition, and embedding training.

WPF-MathForNeVeR/wpf-math

A .NET library for rendering LaTeX-style mathematical formulas in WPF and Avalonia XAML applications.

DataStax C# Driverdatastax/csharp-driver

A modern, feature-rich C# client library for Apache Cassandra and DataStax Enterprise using Cassandra's binary protocol.

SharpRepositorySharpRepository/SharpRepository

A generic C# repository pattern implementation supporting Entity Framework, RavenDB, MongoDB, and other databases with built-in caching.

Cache TowerTurnerSoftware/CacheTower

A high-performance multi-layered caching library for .NET, combining in-memory, file, Redis, and MongoDB layers for speed and resilience.

Tradylppkarl/Trady

A .NET library for computing technical indicators, building trading strategies, and backtesting automated stock trading systems.

AspNetCore.Proxytwitchax/AspNetCore.Proxy

A lightweight library for creating HTTP and WebSocket proxies in ASP.NET Core applications with minimal configuration.

AlgorithmiaSolutionsDesign/Algorithmia

A comprehensive .NET library providing sophisticated algorithms and data structures like graphs, priority queues, and undo-redo functionality.