Ranked by Attention Score: stars gained over the last 180 complete days
1–100 of 136 by Attention Score · May 9, 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.
Lean Algorithmic Trading Engine by QuantConnect (Python, C#)
Remove large amounts of unwanted applications quickly.
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.
Bootstrap Blazor is an enterprise-level UI component library based on Bootstrap and Blazor.
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.
OpenCV wrapper for .NET
Automate SSL/TLS certificates on Windows with ease
Flexible and versatile OAuth 2.0/OpenID Connect stack for .NET
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.
Mutation testing for .NET core and .NET framework!
A popular .NET validation library for building strongly-typed validation rules.
An open-source platform for Visual AI.
A C# architecture test library to specify and assert architecture rules in C# for automated testing.
Distributed Application Framework for .NET
Quartz Enterprise Scheduler .NET
The .NET library for ImageMagick
Free open source office suite with business productivity tools: document and project management, CRM, mail aggregator.
AI Multi-Agent Framework in .NET
:cyclone: Clean Architecture with .NET6, C#10 and React+Redux. Use cases as central organizing structure, completely testable, decoupled from frameworks
A semi-opinionated library which is a source generator and a code analyser. It Source generates Value Objects
IoTSharp is an open-source IoT platform for data collection, processing, visualization, and device management.
Papercut SMTP -- The Simple Desktop Email Server
Random testing library for C#
.Net port of the original java-based barcode reader and generator library zxing
Fluent migrations framework for .NET
A C# parser construction toolkit with high-quality error reporting
MultiTenant is an open source multi-tenancy library for modern .NET created and maintained by Finbuckle LLC.
The official AWS SDK for .NET. For more information on the AWS SDK for .NET, see our web site:
A production-ready data access platform for .NET applications.
Durable Task Framework allows users to write long running persistent workflows in C# using the async/await capabilities.
Stripe.net is a sync/async .NET 4.6.1+ client, and a portable class library for stripe.com.
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.
Implementation of Python 3.x for .NET Framework that is built on top of the Dynamic Language Runtime.
An authorization library that supports access control models like ACL, RBAC, ABAC in .NET (C#)
Enterprise HealthChecks for ASP.NET Core Diagnostics Package
A simple, cross platform, modulith ecommerce system built on .NET
WebApi toolset that allows you to make CRUD REST APIs with one line of code and to create gRPC and SignalR from reusable components too
This strongly-typed, client library enables working with Elasticsearch. It is the official client maintained and supported by Elastic.
Confluent's Apache Kafka .NET client
The Official C# .NET Driver for MongoDB
PeachPie - the PHP compiler and runtime for .NET and .NET Core
Pluggable foundation blocks for building distributed apps.
Proto Actor - Ultra fast distributed actors for Go, C# and Java/Kotlin
Roslyn tool that for a given C# program shows syntax tree API calls to construct its syntax tree
Lightweight message bus interface for .NET (pub/sub and request-response) with transport plugins for popular message brokers.
Apache Log4net is a versatile, feature-rich, efficient logging API and backend for .NET
[Archived] Middleware for security and authorization of web apps. Project moved to https://github.com/aspnet/AspNetCore
Google Cloud Client Libraries for .NET
High performance understanding for stack traces (Make error logs more productive)
Template engine based on Microsoft's Razor parsing engine for .NET Core
🎯 A .NET library, developed by humans, for running a target dependency graph.
Library simplifying the concept of opening dialogs from a view model when using MVVM in WPF
CacheManager is an open source caching abstraction layer for .NET written in C#. It supports various cache providers and implements many advanced features.
DnsClient.NET is a simple yet very powerful and high performant open source library for the .NET Framework to do DNS lookups
The .NET Standard / .NET Core version from the System Linq Dynamic functionality.
Realm is a mobile database: a replacement for SQLite & ORMs
Simple command-line HTTPS server for the .NET Core CLI
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 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.
Use docker/podman, compose local and remote via a FluentAPI
SmartSql = MyBatis in C# + .NET Core+ Cache(Memory | Redis) + R/W Splitting + PropertyChangedTrack +Dynamic Repository + InvokeSync + Diagnostics
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.
Command line parsing and utilities for .NET
.NET Port of Tobias Lütke's Liquid template language.
Open source MVVM framework for Web Apps
a .NET library that can read/write Office formats without Microsoft Office installed. No COM+, no interop.
Lightweight library for in-memory background processing in .NET applications.
Open source industrial IoT connectivity gateway.
An analyzer library for C# and VB that uses Roslyn to produce refactorings, code analysis, and other niceties.
Fast, idiomatic C# implementation of Flatbuffers
Trady is a handy library for computing technical indicators, and it targets to be an automated trading system that provides stock data feeding, indicator computing, strategy building and automatic trading. It is built based on .NET Standard 2.0.
IL2C - A translator for ECMA-335 CIL/MSIL to C language.
An easy service hosting framework for building Windows services using .NET
App Metrics is an open-source and cross-platform .NET library used to record and report metrics within an application.
Microdot: An open source .NET microservices framework
Firebase Admin .NET SDK
Cloud Download Manager for direct links and media files from Youtube/Spotify/etc with media converter and builtin proxy to bypass restrictions
DataStax C# Driver for Apache Cassandra
The official C# Client for NATS
A Serilog configuration provider that reads from Microsoft.Extensions.Configuration
Very simple SAML 2.0 consumer module for ASP.NET/C#
Managed .NET wrapper for unmanaged PKCS#11 libraries