Ranked by Attention Score: stars gained over the last 30 complete days
1–100 of 102 by Attention Score · Oct 6, 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#)
A Dynamic Island for Windows 11 with AI coding tool quotas, usage tracking, music controls, and more.
TranslatedBig Blue Fish desktop pet with local LLM. A Windows AI desktop pet with a built-in 4B local large model. It uses a whale-girl persona that combines weather, tech news and the current application to keep you gentle company through text bubbles. Supports one-click installation and pausing inference when off power.
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.
Convert, Compress, Resize, and more in Windows Explorer.
C# application with primary purpose of farming Steam cards from multiple accounts simultaneously.
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.
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.
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
Automate SSL/TLS certificates on Windows with ease
A .NET source generator for generating object mappings. No runtime reflection.
Mutation testing for .NET core and .NET framework!
A cute running cat animation on your windows taskbar.
Pure C# 3D real time physics simulation library, now with a higher version number.
Random testing library for C#
Quartz Enterprise Scheduler .NET
The .NET library for ImageMagick
OpenCV wrapper for .NET
An open-source platform for Visual AI.
A popular .NET validation library for building strongly-typed validation rules.
A C# architecture test library to specify and assert architecture rules in C# for automated testing.
Distributed Application Framework for .NET
:cyclone: Clean Architecture with .NET6, C#10 and React+Redux. Use cases as central organizing structure, completely testable, decoupled from frameworks
Free open source office suite with business productivity tools: document and project management, CRM, mail aggregator.
AI Multi-Agent Framework in .NET
.Net port of the original java-based barcode reader and generator library zxing
A semi-opinionated library which is a source generator and a code analyser. It Source generates Value Objects
This strongly-typed, client library enables working with Elasticsearch. It is the official client maintained and supported by Elastic.
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.
Fluent migrations framework for .NET
The official AWS SDK for .NET. For more information on the AWS SDK for .NET, see our web site:
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.
PeachPie - the PHP compiler and runtime for .NET and .NET Core
Durable Task Framework allows users to write long running persistent workflows in C# using the async/await capabilities.
Lightweight message bus interface for .NET (pub/sub and request-response) with transport plugins for popular message brokers.
Pluggable foundation blocks for building distributed apps.
Template engine based on Microsoft's Razor parsing engine for .NET Core
Stripe.net is a sync/async .NET 4.6.1+ client, and a portable class library for stripe.com.
An authorization library that supports access control models like ACL, RBAC, ABAC in .NET (C#)
A C# parser construction toolkit with high-quality error reporting
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
Papercut SMTP -- The Simple Desktop Email Server
Proto Actor - Ultra fast distributed actors for Go, C# and Java/Kotlin
Realm is a mobile database: a replacement for SQLite & ORMs
[Archived] Middleware for security and authorization of web apps. Project moved to https://github.com/aspnet/AspNetCore
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.
A simple, cross platform, modulith ecommerce system built on .NET
Enterprise HealthChecks for ASP.NET Core Diagnostics Package
The Official C# .NET Driver for MongoDB
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.
[Archived] Incredibly simple real-time web for ASP.NET Core. Project moved to https://github.com/aspnet/AspNetCore
[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
Roslyn tool that for a given C# program shows syntax tree API calls to construct its syntax tree
.NET Port of Tobias Lütke's Liquid template language.
Google Cloud Client Libraries for .NET
DnsClient.NET is a simple yet very powerful and high performant open source library for the .NET Framework to do DNS lookups
Simple command-line HTTPS server for the .NET Core CLI
Efficient reliable UDP unicast, UDP multicast, and IPC message transport - .NET port of Aeron
Free and open source schema versioning and database migration made natively with .NET/6. NEW THIS MAY 2022! v1.3.15 released!
Confluent's Apache Kafka .NET client
An easy service hosting framework for building Windows services using .NET
[Archived] This repository has been archived
Implementation of Python 3.x for .NET Framework that is built on top of the Dynamic Language Runtime.
App Metrics is an open-source and cross-platform .NET library used to record and report metrics within an application.
The .NET Standard / .NET Core version from the System Linq Dynamic functionality.
Use docker/podman, compose local and remote via a FluentAPI
Render After Effects animations natively on Android, iOS, MacOS and TvOS for Xamarin
Source browser website generator that powers https://source.dot.net, https://referencesource.microsoft.com and https://sourceroslyn.io
An analyzer library for C# and VB that uses Roslyn to produce refactorings, code analysis, and other niceties.
SmartSql = MyBatis in C# + .NET Core+ Cache(Memory | Redis) + R/W Splitting + PropertyChangedTrack +Dynamic Repository + InvokeSync + Diagnostics
Open source MVVM framework for Web Apps
A portable logging abstraction for .NET
Fast, idiomatic C# implementation of Flatbuffers
A simple mediator for .Net for sending command, publishing event and request response with pipelines supported
Functional API for Microsoft Orleans http://orleanscontrib.github.io/Orleankka
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.
Firebase Admin .NET SDK
A .NET library for intercepting server-side HTTP requests
Personal Expense Manager -- UWP (+ Blazor) and CQRS+ES.
Generates valid, readable C# from an Expression Tree.
Transform ASP.NET Core into a static site generator.
Lara Web Engine is a lightweight C# framework for web user interface development.
Lightweight library for in-memory background processing in .NET applications.
Version 5 of the Glass mapping framework, the best ORM for Sitecore.