.NET Standard

Optionalnlkl/Optional

A robust option/maybe type for C# that provides a strongly typed alternative to null values, preventing null-reference exceptions.

Cinchoo ETLCinchoo/ChoETL

A simple, fast, and flexible ETL framework for .NET with built-in readers and writers for CSV, JSON, XML, Parquet, and more.

WinApiprasannavl/WinApi

An ultra-thin, high-performance CLR library for Win32 native interop with zero GC allocations during window messages.

lz4netMiloszKrajewski/K4os.Compression.LZ4

A high-performance LZ4 and LZ4HC compression library for .NET, offering fast block and stream compression.

Xabe.FFmpegtomaszzmuda/Xabe.FFmpeg

A .NET Standard wrapper for FFmpeg that simplifies media processing and allows custom FFmpeg arguments from .NET applications.

MediaManagerBaseflow/XamarinMediaManager

A cross-platform Xamarin plugin for native audio and video playback with queue management and media notifications.

DefaultEcsDoraku/DefaultEcs

A high-performance Entity Component System framework for C# game development, prioritizing simplicity and minimal constraints.

Websocket.ClientMarfusios/websocket-client

A .NET/C# websocket client library with built-in reconnection, error handling, and Reactive Extensions support.

Guardsafakgur/guard

A fluent, high-performance argument validation library for .NET library authors.

FireSharpziyasal/FireSharp

An asynchronous cross-platform .NET library for Firebase, providing a REST API wrapper with real-time capabilities.

dotlessdotless/dotless

A .NET port of the Less CSS preprocessor, adding variables, nested rules, and operators to CSS.

Schema.NETRehanSaeed/Schema.NET

Strongly typed C# classes for Schema.org structured data, serializable to JSON-LD and XML for .NET applications.

SQLProviderfsprojects/SQLProvider

A general F# SQL database type provider supporting LINQ queries, schema exploration, CRUD operations, and multiple database vendors.

IdentityModel.OidcClientIdentityModel/IdentityModel.OidcClient

A certified C#/.NET Standard OpenID Connect client library for native mobile and desktop applications implementing RFC 8252.

Power Argsadamabdelhamed/PowerArgs

A .NET Standard command line argument parser that converts arguments into .NET objects with validation, auto-generated usage, and tab completion.

MongoDB.Entitiesdj-nitehawk/MongoDB.Entities

A lightweight .NET data access library for MongoDB with LINQ support and built-in entity relationship management.

FsToolkit.ErrorHandlingdemystifyfp/FsToolkit.ErrorHandling

An opinionated F# library providing utility functions, computation expressions, and operators for working with the Result type.

firebase-admin-dotnetfirebase/firebase-admin-dotnet

Official .NET SDK for accessing Firebase services from server and cloud environments.

RethinkDb.Driverbchavez/RethinkDb.Driver

A C#/.NET driver for RethinkDB with 100% ReQL API coverage, based on the official Java driver architecture.

xBehave.netxbehave/xbehave.net

An xUnit.net extension for writing behavior-driven tests with natural language step descriptions.

SmidgeShazwazza/Smidge

A lightweight runtime CSS/JavaScript minification, bundling, and management library for ASP.NET Core.

ElmahCoreElmahCore/ElmahCore

An error logging and handling library for ASP.NET Core and .NET Standard applications.

Permissionsjamesmontemagno/PermissionsPlugin

A cross-platform plugin for Xamarin and Windows to check and request runtime permissions in mobile apps.

Toasts PluginEgorBo/Toasts.Forms.Plugin

A Xamarin.Forms plugin for displaying native toast notifications across iOS, Android, and Windows platforms.

XamEffectsmrxten/XamEffects

A Xamarin.Forms library providing UI effects like touch feedback, commands, and bordered views.

Universal Bluetooth Beacon Libraryandijakl/universal-beacon

A cross-platform .NET library for managing Bluetooth beacons, parsing Eddystone and iBeacon-compatible frames from BLE advertisements.

Tiny.RestClientjgiacomini/Tiny.RestClient

A fluent, lightweight REST client for .NET that simplifies HTTP communication with automatic serialization and extensive feature support.

Evil-DICOMrexcardan/Evil-DICOM

A simple C# library for reading, writing, and manipulating DICOM files in medical imaging applications.

ros2_dotnetesteve/ros2_dotnet

.NET bindings for ROS2 enabling cross-platform robotics application development in C# and .NET Core.

ElasticsearchCRUDdamienbod/ElasticsearchCRUD

A .NET Standard API for Elasticsearch providing CRUD operations, search queries, aggregations, and mapping support.

BlazorTemplaterconficient/BlazorTemplater

A .NET library that renders Razor Components to HTML strings, ideal for generating email templates and other HTML content.

Portable.Xamlcwensley/Portable.Xaml

A portable .NET Standard library for reading and writing XAML files across desktop, mobile, and .NET Core platforms.

FSharp.Control.FusionTaskskekyo/FSharp.Control.FusionTasks

A library providing seamless interoperability between F# Async workflows and .NET Task/ValueTask for mixed-language asynchronous programming.

AsteroidsWasmaesalazar/AsteroidsWasm

A proof-of-concept .NET Standard library for the classic Asteroids game, ported to multiple platforms including Blazor WebAssembly, Electron, and MAUI.

AspNetCore Extension Librarysgjsakura/AspNetCore

A collection of utility libraries for ASP.NET Core, including tag helpers, middleware, paged lists, and enhanced localization.

GEmojiSharp.Blazorhlaueriksson/GEmojiSharp

A .NET library and toolset for working with GitHub emoji aliases and Unicode characters across C#, ASP.NET Core, Blazor, and command-line tools.