Ranked by Attention Score: stars gained over the last 30 complete days
1–100 of 119 by Attention Score · Oct 7, 2026 – Nov 5, 2026 (UTC)
Application designed to optimize, customize and enhance your Windows experience.
Bitwarden infrastructure/backend (API, database, Docker, etc).
🏞 A fast, open-source, modern image viewer for 90+ formats – including WEBP, GIF, SVG, AVIF, JXL, HEIC and more – built for smooth browsing across Windows, macOS, and Linux.
Algorithmic trading and quantitative trading open source platform to develop trading robots (stock markets, forex, crypto, bitcoins, and options).
Unity plugin for third-party agent platforms
Compile C# and .NET CIL to small standalone Wasm with WASI (AOT with built-in Runtime and Precise GC)
Everything integration for the Windows taskbar.
PEASS - Privilege Escalation Awesome Scripts SUITE (with colors)
TranslatedCloudMoe Windows 10/11 Activation Toolkit get digital license, the best open source Win 10/11 activator in GitHub.
Bitmap & tilemap generation from a single example with the help of ideas from quantum mechanics
Store securely encrypted backups in the cloud!
One framework for creating powerful cross-platform games.
The Unity Machine Learning Agents Toolkit (ML-Agents) is an open-source project that enables games and simulations to serve as environments for training intelligent agents using deep reinforcement learning and imitation learning.
EarTrumpet - Volume Control for Windows
Secure, cross-platform Git credential storage with authentication to GitHub, Azure Repos, and other popular Git hosting services.
The main repository for the development of the evolution game Thrive.
Humanizer meets all your .NET needs for manipulating and displaying strings, enums, dates, times, timespans, numbers and quantities
Unity C# reference source code.
Chocolatey - the package manager for Windows
BizHawk is a multi-system emulator written in C#. BizHawk provides nice features for casual gamers such as full screen, and joypad support in addition to full rerecording and debugging tools for all system cores.
QuestPDF is a modern library for PDF document generation. Its fluent C# API lets you design complex layouts with clean, readable code. Create documents using a flexible, component-based approach.
ASP.NET Core eCommerce software. nopCommerce is a free and open-source shopping cart.
Git Extensions is a standalone UI tool for managing git repositories. It also integrates with Windows Explorer and Microsoft Visual Studio (2015/2017/2019).
Central repository for tools, tutorials, resources, and documentation for robotics simulation in Unity.
Extremely Fast MessagePack Serializer for C#(.NET, .NET Core, Unity, Xamarin). / msgpack.org[C#]
Prism is a framework for building loosely coupled, maintainable, and testable XAML applications in WPF, Xamarin Forms, and Uno / Win UI Applications..
A simple library for creating state machines in C# code
Cross platform GUI framework for desktop and mobile applications in .NET
KurrentDB is a database that's engineered for modern software applications and event-driven architectures. Its event-native design simplifies data modeling and preserves data integrity while the integrated streaming engine solves distributed messaging challenges and ensures data consistency.
:card_index: A simple fake data generator for C#, F#, and VB.NET. Based on and ported from the famed faker.js.
A modern, cross-platform, 2D Graphics library for .NET
Microsoft Azure PowerShell
Roslynator is a set of code analysis tools for C#, powered by Roslyn.
A WebRTC, SIP and VoIP library for C# and .NET. Designed for real-time communications apps.
.NET Community Toolkit is a collection of helpers and APIs that work for all .NET developers and are agnostic of any specific UI platform. The toolkit is maintained and published by Microsoft, and part of the .NET Foundation.
Mono open source ECMA CLI, C# and .NET implementation.
An easy way to perform background job processing in .NET and .NET Core applications. No Windows Service or separate process required
.NET (WPF and Windows Forms) bindings for the Chromium Embedded Framework
Should testing for .NET—the way assertions should be!
The Open Toolkit library is a fast, low-level C# wrapper for OpenGL, OpenAL & OpenCL. It also includes windowing, mouse, keyboard and joystick input and a robust and fast math library, giving you everything you need to write your own renderer or game engine. OpenTK can be used standalone or inside a GUI on Windows, Linux, Mac.
ILGPU JIT Compiler for high-performance .Net GPU programs
The automatic type-safe REST library for .NET. Refit turns a REST API into a C# interface and generates the HttpClient implementation, with support for HttpClientFactory, pluggable serializers and a testing package.
Canonical actor model implementation for .NET with local + distributed actors in C# and F#.
RabbitMQ .NET client for .NET Standard 2.0+ and .NET 4.6.2+
Fellow Oak DICOM for .NET, .NET Core, Universal Windows, Android, iOS, Mono and Unity
Fast and fully streamed Man-On-The-Middle to intercept, record, impersonate and alter HTTP/1.1, H2, websocket and gRPC traffic.
:bus: Simple and lean service bus implementation for .NET
A .NET GIS solution that is fast and reliable for the .NET platform.
All the controls missing in WPF. Over 1 million downloads.
Blazorise is a component library built on top of Blazor with support for CSS frameworks like Bootstrap, Tailwind, Bulma, AntDesign, and Material.
The official Firely .NET SDK for HL7 FHIR
Thoughtfully architected, obscenely fast, thoroughly enjoyable web services for all
A very extensive set of extension methods that allow you to more naturally specify the expected outcome of a TDD or BDD-style unit tests. Targets .NET Framework 4.7, as well as .NET Core 2.1, .NET Core 3.0, .NET 6, .NET Standard 2.0 and 2.1. Supports the unit test frameworks MSTest2, NUnit3, XUnit2, MSpec, and NSpec3.
A friendly substitute for .NET mocking libraries.
EPPlus-Excel spreadsheets for .NET
AI agents can now write 99% of the code. This changes what it means to be a developer. Our role shifts to knowing "what good looks like". To do that, we need completely new developer tools. Tendril is what replaces your IDE in an agentic era.
xUnit.net is a free, open source, community-focused unit testing tool for .NET.
DotNetty project – a port of netty, event-driven asynchronous network application framework
A 100% native C# implementation of ZeroMQ for .NET
A ROS/ROS2 Multi-robot Simulator for Autonomous Vehicles
An advanced audio library, written in C#. Provides tons of features. From playing/recording audio to decoding/encoding audio streams/files to processing audio data in realtime (e.g. applying custom effects during playback, create visualizations,...). The possibilities are nearly unlimited.
Fast and easy to use .NET library that creates or modifies Microsoft Word files without installing Word.
Open source, headless, multi-tenant eCommerce platform built with .NET Core, MongoDB, AWS DocumentDB, Azure CosmosDB, Vue.js.
An interpreter for the Lua language, written entirely in C# for the .NET, Mono, Xamarin and Unity3D platforms, including handy remote debugger facilities.
Workflow Engine by Optimajet, the embeddable workflow engine for .NET and C#. Approvals, state machines and long-running processes with a visual Workflow Designer, BPMN import and six databases.
Code analyzer for C# and VB.NET projects
DSLR camera remote control open source software
Protocol Buffers library for idiomatic .NET
A set of tools for graph layout and viewing
Virto's Commerce Innovation Platform. Source-available, modular .NET commerce backend built on Virto Atomic Architecture™.
A lightweight text templating library written in C# which can be a drop-in replacement for string.Format
Extracts Exif, IPTC, XMP, ICC and other metadata from image, video and audio files
.NET Standard wrapper for FFmpeg. It allows to process media without know how FFmpeg works, and can be used to pass customized arguments to FFmpeg from dotnet core application.
Digital Elevation model library in C#. 3D terrain models, line/point Elevations, intervisibility reports
Flexible OpenID Connect and OAuth 2.0 server-side implementation for modern ASP.NET projects
An open source fork of Windows Live Writer
Jwt.Net, a JWT (JSON Web Token) implementation for .NET
iText for .NET is the .NET version of the iText library, formerly known as iTextSharp, which it replaces. iText represents the next level of SDKs for developers that want to take advantage of the benefits PDF can bring. Equipped with a better document engine, high and low-level programming capabilities and the ability to create, edit and enha
Xamarin.Essentials is no longer supported. Migrate your apps to .NET MAUI, which includes Maui.Essentials.
Blazor UI component library based on Material Design. Support Blazor Server, Blazor WebAssembly and MAUI Blazor.
Manic Digger - a multiplayer block-building voxel game, Minecraft clone
Xamarin.Forms is no longer supported. Migrate your apps to .NET MAUI.
Entity Framework EF Core efcore Bulk Batch Extensions with BulkCopy in .Net for Insert Update Delete Read (CRUD), Truncate and SaveChanges operations on SQL Server, PostgreSQL, MySQL, SQLite, Oracle
Async/await first CQRS+ES and DDD framework for .NET
Sandcastle Help File Builder (SHFB). A standalone GUI, Visual Studio integration package, and MSBuild tasks providing full configuration and extensibility for building help files with the Sandcastle tools.