Ranked by Attention Score: stars gained over the last 90 complete days
1–100 of 136 by Attention Score · Aug 7, 2026 – Nov 4, 2026 (UTC)
OfficeCLI is the first and best Office suite purpose-built for AI agents to read, edit, and automate Word, Excel, and PowerPoint files. Free, open-source, single binary, no Office installation required.
Remove large amounts of unwanted applications quickly.
Lean Algorithmic Trading Engine by QuantConnect (Python, C#)
AI Skills, MCP Tools, and CLI for Unity Engine. Full AI develop and test loop. Use cli for quick setup. Efficient token usage, advanced tools. Any C# method may be turned into a tool by a single line. Works with Claude Code, Gemini, Copilot, Cursor and any other absolutely for free.
C# application with primary purpose of farming Steam cards from multiple accounts simultaneously.
A cute running cat animation on your windows taskbar.
Open-source platform for building cross-platform native Mobile, Web, Desktop, and Embedded apps from a single C#/XAML codebase. Work from any IDE/CLI with Hot Reload, Visual Designer, MCPs, and Skills built for modern .NET workflows. 200M+ NuGet downloads.
Godot-MCP — Model Context Protocol (MCP) integration for the Godot Engine. AI tools for the Godot Editor in C#, with cloud connection to ai-game.dev. Apache-2.0.
Bootstrap Blazor is an enterprise-level UI component library based on Bootstrap and Blazor.
Flexible and versatile OAuth 2.0/OpenID Connect stack for .NET
OpenCV wrapper for .NET
Mutation testing for .NET core and .NET framework!
Automate SSL/TLS certificates on Windows with ease
A .NET source generator for generating object mappings. No runtime reflection.
Pure C# 3D real time physics simulation library, now with a higher version number.
Random testing library for C#
Quartz Enterprise Scheduler .NET
An open-source platform for Visual AI.
A C# architecture test library to specify and assert architecture rules in C# for automated testing.
A popular .NET validation library for building strongly-typed validation rules.
Distributed Application Framework for .NET
The .NET library for ImageMagick
:cyclone: Clean Architecture with .NET6, C#10 and React+Redux. Use cases as central organizing structure, completely testable, decoupled from frameworks
AI Multi-Agent Framework in .NET
Free open source office suite with business productivity tools: document and project management, CRM, mail aggregator.
A semi-opinionated library which is a source generator and a code analyser. It Source generates Value Objects
.Net port of the original java-based barcode reader and generator library zxing
A production-ready data access platform for .NET applications.
MultiTenant is an open source multi-tenancy library for modern .NET created and maintained by Finbuckle LLC.
Papercut SMTP -- The Simple Desktop Email Server
IoTSharp is an open-source IoT platform for data collection, processing, visualization, and device management.
The official AWS SDK for .NET. For more information on the AWS SDK for .NET, see our web site:
Fluent migrations framework for .NET
Stripe.net is a sync/async .NET 4.6.1+ client, and a portable class library for stripe.com.
A C# parser construction toolkit with high-quality error reporting
SuperSocket is a high-performance, extensible socket server application framework for .NET. It provides a robust architecture for building custom network communication applications with support for multiple protocols including TCP, UDP, and WebSocket.
An authorization library that supports access control models like ACL, RBAC, ABAC in .NET (C#)
Enterprise HealthChecks for ASP.NET Core Diagnostics Package
This strongly-typed, client library enables working with Elasticsearch. It is the official client maintained and supported by Elastic.
Durable Task Framework allows users to write long running persistent workflows in C# using the async/await capabilities.
Roslyn tool that for a given C# program shows syntax tree API calls to construct its syntax tree
PeachPie - the PHP compiler and runtime for .NET and .NET Core
Confluent's Apache Kafka .NET client
A simple, cross platform, modulith ecommerce system built on .NET
Implementation of Python 3.x for .NET Framework that is built on top of the Dynamic Language Runtime.
The Official C# .NET Driver for MongoDB
[Archived] Middleware for security and authorization of web apps. Project moved to https://github.com/aspnet/AspNetCore
Lightweight message bus interface for .NET (pub/sub and request-response) with transport plugins for popular message brokers.
Proto Actor - Ultra fast distributed actors for Go, C# and Java/Kotlin
Apache Log4net is a versatile, feature-rich, efficient logging API and backend for .NET
Engine-agnostic MCP server shared by Unity-MCP, Godot-MCP and Unreal-MCP
Pluggable foundation blocks for building distributed apps.
Realm is a mobile database: a replacement for SQLite & ORMs
Template engine based on Microsoft's Razor parsing engine for .NET Core
Use docker/podman, compose local and remote via a FluentAPI
Google Cloud Client Libraries for .NET
High performance understanding for stack traces (Make error logs more productive)
CacheManager is an open source caching abstraction layer for .NET written in C#. It supports various cache providers and implements many advanced features.
Command line parsing and utilities for .NET
Source browser website generator that powers https://source.dot.net, https://referencesource.microsoft.com and https://sourceroslyn.io
.NET Port of Tobias Lütke's Liquid template language.
A simple mediator for .Net for sending command, publishing event and request response with pipelines supported
Efficient reliable UDP unicast, UDP multicast, and IPC message transport - .NET port of Aeron
The Web Markup Minifier (abbreviated WebMarkupMin) - a .NET library that contains a set of markup minifiers. The objective of this project is to improve the performance of web applications by reducing the size of HTML, XHTML and XML code.
The Universal Device Detection library will parse any User Agent and detect the browser, operating system, device used (desktop, tablet, mobile, tv, cars, console, etc.), brand and model.
The .NET Standard / .NET Core version from the System Linq Dynamic functionality.
SmartSql = MyBatis in C# + .NET Core+ Cache(Memory | Redis) + R/W Splitting + PropertyChangedTrack +Dynamic Repository + InvokeSync + Diagnostics
Library simplifying the concept of opening dialogs from a view model when using MVVM in WPF
Fast, idiomatic C# implementation of Flatbuffers
Backend API for location-based games or mapping applications powered by OpenStreetMap data. Renders maptiles without external dependencies in C# from SQL Server, MariaDB, or PostgreSQL
[Archived] Incredibly simple real-time web for ASP.NET Core. Project moved to https://github.com/aspnet/AspNetCore
App Metrics is an open-source and cross-platform .NET library used to record and report metrics within an application.
Render After Effects animations natively on Android, iOS, MacOS and TvOS for Xamarin
An analyzer library for C# and VB that uses Roslyn to produce refactorings, code analysis, and other niceties.
DnsClient.NET is a simple yet very powerful and high performant open source library for the .NET Framework to do DNS lookups
Simple microORM that maps the results of a query onto a POCO object. Project based on Schotime's branch of PetaPoco
Open source MVVM framework for Web Apps
A portable logging abstraction for .NET
Firebase Admin .NET SDK
[Archived] ASP.NET Core Identity is the membership system for building ASP.NET Core web applications, including membership, login, and user data. Project moved to https://github.com/aspnet/AspNetCore
Microdot: An open source .NET microservices framework
Simple command-line HTTPS server for the .NET Core CLI
A simple, direct, ultra-thin CLR library for high-performance Win32 Native Interop
DataStax C# Driver for Apache Cassandra
The official C# Client for NATS
FreshMvvm is a super light Mvvm Framework designed specifically for Xamarin.Forms. It's designed to be Easy, Simple and Flexible.
IL2C - A translator for ECMA-335 CIL/MSIL to C language.