Net Core GitHub Repositories (2026) · Open Source Tools

This repository contains set of components extending functionality of the OpenTelemetry .NET SDK. Instrumentation libraries, exporters, and other components can find their home here.

The .NET library to build AI agents with 30+ built-in connectors.

Write your pipelines in C# !

The original DasBlog reimagined with ASP.NET Core

A filled with self-loathing implementation of Basic Authentication, and Certificate Authentication to make me feel like a real security person, all for for ASP.NET Core

DacFx, SqlPackage, and other SQL development libraries enable declarative database development and database portability across SQL versions and environments. Share feedback here on dacpacs, bacpacs, and SQL projects.

Highly Performant & Scalable Ultima Online Server Emulator

An opinionated HTTP library for .NET applications built on HttpClient message handlers. Provides request de-duplication, prioritised concurrency limiting, speculative background fetching and optional response caching.

This repository contains low-level bindings for Vulkan used in Evergine.

A library for managing concurrent asynchronous operations in .NET. Provides bounded concurrency, priority scheduling and key-based serialization over a single queue, with Task and IObservable APIs.

Open-source e-commerce platform for .NET 10 and MongoDB: multi-store, multi-vendor marketplace, B2B/B2C, headless REST API, Vue 3 storefront, Docker.

Sass Compiler Library for .NET Core 3.1/5.x/6.x/7.x without node, using dart-sass as a compiler

Source generator that helps register attribute marked services in the dependency injection ServiceCollection

HA Add-on / Docker container that solves indoor positions with mqtt data received from multiple ESPresense nodes

FxSsh is a lightweight SSH server side library. As an early codebase for Microsoft's Dev Tunnels SSH library. https://github.com/microsoft/dev-tunnels-ssh/tree/main/src/cs/Ssh#acknowledgements

A YubiKey SDK for .NET developers

Unofficial Tailwind CSS extension for IntelliSense, linting, sorting, and more to enhance the development experience in Visual Studio 2026 and 2022.

DNTCommon.Web.Core provides common scenarios' solutions for ASP.NET Core applications.

A modding tool for osu!

A library for using FluentValidation with Blazor EditForm components. Provides seamless integration between FluentValidation and Blazor forms with support for real-time validation, nested objects, async validation, and rule sets.