1.QuantConnect / Lean
Lean Algorithmic Trading Engine by QuantConnect (Python, C#)
+103 stars
from 22,233 · score 4.64
Trending repositories
Ranked by Attention Score: stars gained over the last 7 complete days
95 repositories by Attention Score · Oct 27, 2026 – Nov 2, 2026 (UTC)
2.icsharpcode / ILSpy
.NET Decompiler with support for PDB generation, ReadyToRun, Metadata (&more) - cross-platform!
+91 stars
from 26,815 · score 4.52
3.StockSharp / StockSharp
Algorithmic trading and quantitative trading open source platform to develop trading robots (stock markets, forex, crypto, bitcoins, and options).
+41 stars
from 10,996 · score 3.74
4.studyzy / imewlconverter
”深蓝词库转换“ 一款开源免费的输入法词库转换程序
+31 stars
from 10,466 · score 3.47
5.AvaloniaUI / Avalonia
Develop Desktop, Embedded, Mobile and WebAssembly apps with C# and XAML. The future of .NET UI
+30 stars
from 31,713 · score 3.43
6.MonoGame / MonoGame
One framework for creating powerful cross-platform games.
+24 stars
from 14,572 · score 3.22
7.google / flatbuffers
FlatBuffers: Memory Efficient Serialization Library
+22 stars
from 26,579 · score 3.14
8.JustArchiNET / ArchiSteamFarm
C# application with primary purpose of farming Steam cards from multiple accounts simultaneously.
+15 stars
from 13,767 · score 2.77
9.duplicati / duplicati
Store securely encrypted backups in the cloud!
+14 stars
from 15,164 · score 2.71
10.unoplatform / uno
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.
+13 stars
from 10,086 · score 2.64
11.EvotecIT / OfficeIMO
MIT-licensed, COM-free .NET libraries for creating, reading, editing, converting, rendering, and extracting Office, PDF, email, OneNote, and text formats.
+13 stars
from 636 · score 2.64
12.mRemoteNG / mRemoteNG
mRemoteNG is the next generation of mRemote, open source, tabbed, multi-protocol, remote connections manager.
+12 stars
from 11,171 · score 2.56
13.OrchardCMS / OrchardCore
Orchard Core is an open-source modular and multi-tenant application framework built with ASP.NET Core, and a content management system (CMS) built on top of that framework.
+10 stars
from 8,213 · score 2.40
14.MessagePack-CSharp / MessagePack-CSharp
Extremely Fast MessagePack Serializer for C#(.NET, .NET Core, Unity, Xamarin). / msgpack.org[C#]
+9 stars
from 6,802 · score 2.30
15.abpframework / abp
Open-source web application framework for ASP.NET Core! Offers an opinionated architecture to build enterprise software solutions with best practices on top of the .NET. Provides the fundamental infrastructure, cross-cutting-concern implementations, startup templates, application modules, UI themes, tooling and documentation.
+8 stars
from 14,458 · score 2.20
16.dotnet / BenchmarkDotNet
Powerful .NET library for benchmarking
+8 stars
from 11,518 · score 2.20
17.JamesNK / Newtonsoft.Json
Json.NET is a popular high-performance JSON framework for .NET
+8 stars
from 11,314 · score 2.20
18.QuestPDF / QuestPDF
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.
+7 stars
from 14,209 · score 2.08
19.quartznet / quartznet
Quartz Enterprise Scheduler .NET
+7 stars
from 7,096 · score 2.08
20.jstedfast / MailKit
A cross-platform .NET library for IMAP, POP3, and SMTP.
+7 stars
from 6,863 · score 2.08
21.akkadotnet / akka.net
Canonical actor model implementation for .NET with local + distributed actors in C# and F#.
+7 stars
from 5,089 · score 2.08
22.TASEmulators / BizHawk
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.
+7 stars
from 2,806 · score 2.08
23.kanaka / mal
mal - Make a Lisp
+6 stars
from 10,749 · score 1.95
24.chocolatey / choco
Chocolatey - the package manager for Windows
+5 stars
from 11,557 · score 1.79
25.PrismLibrary / Prism
Prism is a framework for building loosely coupled, maintainable, and testable XAML applications in WPF, Xamarin Forms, and Uno / Win UI Applications..
+5 stars
from 6,861 · score 1.79
26.AngleSharp / AngleSharp
:angel: The ultimate angle brackets parser library parsing HTML5, MathML, SVG and CSS to construct a DOM based on the official W3C specifications.
+5 stars
from 5,543 · score 1.79
27.riok / mapperly
A .NET source generator for generating object mappings. No runtime reflection.
+5 stars
from 4,197 · score 1.79
28.MaterialDesignInXAML / MaterialDesignInXamlToolkit
Google's Material Design in XAML & WPF, for C# & VB.Net.
+4 stars
from 16,285 · score 1.61
29.dotnet / efcore
EF Core is a modern object-database mapper for .NET. It supports LINQ queries, change tracking, updates, and schema migrations.
+4 stars
from 14,810 · score 1.61
30.bchavez / Bogus
:card_index: A simple fake data generator for C#, F#, and VB.NET. Based on and ported from the famed faker.js.
+4 stars
from 9,746 · score 1.61
31.Cysharp / MagicOnion
Unified Realtime/API framework for .NET platform and Unity.
+4 stars
from 4,456 · score 1.61
32.npgsql / npgsql
Npgsql is the .NET data provider for PostgreSQL.
+4 stars
from 3,744 · score 1.61
33.mono / CppSharp
Tools and libraries to glue C/C++ APIs to high-level languages
+4 stars
from 3,404 · score 1.61
34.icsharpcode / AvalonEdit
The WPF-based text editor component used in SharpDevelop
+4 stars
from 2,083 · score 1.61
35.dotpcap / sharppcap
Official repository - Fully managed, cross platform (Windows, Mac, Linux) .NET library for capturing packets
+4 stars
from 1,480 · score 1.61
36.SixLabors / ImageSharp
A modern, cross-platform, 2D Graphics library for .NET
+3 stars
from 8,042 · score 1.39
37.ServiceStack / ServiceStack
Thoughtfully architected, obscenely fast, thoroughly enjoyable web services for all
+3 stars
from 5,498 · score 1.39
38.MapsterMapper / Mapster
A fast, fun and stimulating object to object Mapper
+3 stars
from 5,181 · score 1.39
39.elastic / elasticsearch-net
This strongly-typed, client library enables working with Elasticsearch. It is the official client maintained and supported by Elastic.
+3 stars
from 3,651 · score 1.39
40.opentk / opentk
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.
+3 stars
from 3,544 · score 1.39
41.SteamRE / SteamKit
SteamKit2 is a .NET library designed to interoperate with Valve's Steam network. It aims to provide a simple, yet extensible, interface to perform various actions on the network.
+3 stars
from 3,218 · score 1.39
42.lukencode / FluentEmail
All in one email sender for .NET. Supports popular senders (SendGrid, MailGun, etc) and Razor templates.
+3 stars
from 3,215 · score 1.39
43.snozbot / fungus
An easy to use Unity 3D library for creating illustrated Interactive Fiction games and more.
+3 stars
from 1,953 · score 1.39
44.rodri-oliveira-dev / Dapper-FluentMap
Fluent mapping for Dapper, with conventions, immutable object materialization, analyzers, source generators, DI integration, and Dommel support.
+3 stars
from 456 · score 1.39
45.dotnet / coreclrArchived
CoreCLR is the runtime for .NET Core. It includes the garbage collector, JIT compiler, primitive data types and low-level classes.
+2 stars
from 12,753 · score 1.10
46.MassTransit / MassTransit
Distributed Application Framework for .NET
+2 stars
from 7,811 · score 1.10
47.sschmid / Entitas
Entitas is a super fast Entity Component System (ECS) Framework specifically made for C# and Unity
+2 stars
from 7,678 · score 1.10
48.louthy / language-ext
C# pure functional programming framework - come and get declarative!
+2 stars
from 7,081 · score 1.10
49.ChilliCream / graphql-platform
Welcome to the home of the Hot Chocolate GraphQL server for .NET, the Strawberry Shake GraphQL client for .NET and Nitro the awesome Monaco based GraphQL IDE.
+2 stars
from 5,761 · score 1.10
50.Shane32 / QRCoder
A pure C# Open Source QR Code implementation
+2 stars
from 5,173 · score 1.10
51.autofac / Autofac
An addictive .NET IoC container
+2 stars
from 4,660 · score 1.10
52.xunit / xunit
xUnit.net is a free, open source, community-focused unit testing tool for .NET.
+2 stars
from 4,614 · score 1.10
53.tmenier / Flurl
Fluent URL builder and testable HTTP client for .NET
+2 stars
from 4,405 · score 1.10
54.MvvmCross / MvvmCross
The .NET MVVM framework for cross-platform solutions, including Android, iOS, MacCatalyst, macOS, tvOS, WPF, WinUI
+2 stars
from 3,920 · score 1.10
55.StephenCleary / AsyncEx
A helper library for async/await.
+2 stars
from 3,725 · score 1.10
56.IgnaceMaes / MaterialSkin
Theming .NET WinForms, C# or VB.Net, to Google's Material Design Principles.
+2 stars
from 3,044 · score 1.10
57.nsubstitute / NSubstitute
A friendly substitute for .NET mocking libraries.
+2 stars
from 2,981 · score 1.10
58.rebus-org / Rebus
:bus: Simple and lean service bus implementation for .NET
+2 stars
from 2,672 · score 1.10
59.eventflow / EventFlow
Async/await first CQRS+ES and DDD framework for .NET
+2 stars
from 2,568 · score 1.10
60.reactiveui / Akavache
An asynchronous, persistent key-value store for .NET desktop and mobile applications, backed by SQLite. Suited to both durable data such as user settings and cached data that expires, with optional encryption and System.Text.Json serialization.
+2 stars
from 2,549 · score 1.10
61.rabbitmq / rabbitmq-dotnet-client
RabbitMQ .NET client for .NET Standard 2.0+ and .NET 4.6.2+
+2 stars
from 2,287 · score 1.10
62.jstedfast / MimeKit
A .NET MIME creation and parser library with support for S/MIME, PGP, DKIM, TNEF and Unix mbox spools.
+2 stars
from 2,009 · score 1.10
63.xceedsoftware / DocX
Fast and easy to use .NET library that creates or modifies Microsoft Word files without installing Word.
+2 stars
from 1,922 · score 1.10
64.NetTopologySuite / NetTopologySuite
A .NET GIS solution that is fast and reliable for the .NET platform.
+2 stars
from 1,726 · score 1.10
65.NeutroniumCore / Neutronium
🚀 Build .NET desktop applications using HTML, CSS and javascript.
+2 stars
from 1,348 · score 1.10
66.fo-dicom / fo-dicom
Fellow Oak DICOM for .NET, .NET Core, Universal Windows, Android, iOS, Mono and Unity
+2 stars
from 1,217 · score 1.10
67.MaximumADHD / Roblox-Studio-Mod-Manager
An open-source custom bootstrapper for Roblox Studio that allows you to override files in Roblox Studio's directory, opt into development branches of Roblox, and experiment with Fast Flags.
+2 stars
from 394 · score 1.10
68.cefsharp / CefSharp
.NET (WPF and Windows Forms) bindings for the Chromium Embedded Framework
+1 stars
from 10,266 · score 0.69
69.Squirrel / Squirrel.Windows
An installation and update framework for Windows desktop apps
+1 stars
from 7,988 · score 0.69
70.cake-build / cake
:cake: Cake (C# Make) is a cross platform build automation system.
+1 stars
from 4,198 · score 0.69
71.mcintyre321 / OneOf
Easy to use F#-like ~discriminated~ unions for C# with exhaustive compile time matching
+1 stars
from 4,059 · score 0.69
72.VsVim / VsVim
Vim Emulator Plugin for Visual Studio 2015+
+1 stars
from 3,769 · score 0.69
73.oxyplot / oxyplot
A cross-platform plotting library for .NET
+1 stars
from 3,542 · score 0.69
74.Dotnet-Boxed / Templates
.NET project templates with batteries included, providing the minimum amount of code required to get you going faster.
+1 stars
from 3,483 · score 0.69
75.jbevain / cecil
Cecil is a library to inspect, modify and create .NET programs and libraries.
+1 stars
from 3,007 · score 0.69
76.mono / monodevelopArchived
MonoDevelop is a cross platform .NET IDE
+1 stars
from 2,895 · score 0.69
77.IronLanguages / ironpython3
Implementation of Python 3.x for .NET Framework that is built on top of the Dynamic Language Runtime.
+1 stars
from 2,761 · score 0.69
78.adamhathcock / sharpcompress
SharpCompress is a fully managed C# library to deal with many compression types and formats.
+1 stars
from 2,594 · score 0.69
79.statianzo / Fleck
C# Websocket Implementation
+1 stars
from 2,443 · score 0.69
80.neuecc / ZeroFormatterArchived
Infinitely Fast Deserializer for .NET, .NET Core and Unity.
+1 stars
from 2,423 · score 0.69
81.MichaCo / CacheManager
CacheManager is an open source caching abstraction layer for .NET written in C#. It supports various cache providers and implements many advanced features.
+1 stars
from 2,422 · score 0.69
82.helix-toolkit / helix-toolkit
Helix Toolkit is a collection of 3D components for .NET.
+1 stars
from 2,287 · score 0.69
83.oqtane / oqtane.framework
Oqtane is an open-source developer productivity platform for building modern .NET applications and websites that run on Web, Desktop and Mobile.
+1 stars
from 2,258 · score 0.69
84.FoundatioFx / Foundatio
Pluggable foundation blocks for building distributed apps.
+1 stars
from 2,103 · score 0.69
85.shuxinqin / Chloe
A lightweight and high-performance Object/Relational Mapping(ORM) library for .NET --C#
+1 stars
from 1,540 · score 0.69
86.ServiceStack / ServiceStack.OrmLiteArchived
Fast, Simple, Typed ORM for .NET
+1 stars
from 1,516 · score 0.69
87.Handlebars-Net / Handlebars.Net
A real .NET Handlebars engine
+1 stars
from 1,465 · score 0.69
88.AdamsLair / dualityArchived
a 2D Game Development Framework
+1 stars
from 1,422 · score 0.69
89.ServiceStack / ServiceStack.TextArchived
.NET's fastest JSON, JSV and CSV Text Serializers
+1 stars
from 1,215 · score 0.69
90.BcryptNet / bcrypt.net
BCrypt.Net - Bringing updates to the original bcrypt package
+1 stars
from 998 · score 0.69
91.SolrNet / SolrNet
Solr client for .Net
+1 stars
from 951 · score 0.69
92.SonarSource / sonar-dotnet
Code analyzer for C# and VB.NET projects
+1 stars
from 921 · score 0.69
93.RehanSaeed / Schema.NET
Schema.org objects turned into strongly typed C# POCO classes for use in .NET. All classes can be serialized into JSON/JSON-LD and XML, typically used to represent structured data in the head section of html page.
+1 stars
from 689 · score 0.69
94.ttu / json-flatfile-datastore
Simple JSON flat file data store with support for typed and dynamic data.
+1 stars
from 477 · score 0.69
95.gregyjames / OctaneDownloader
A high performance, multi-threaded C# file download library.
+1 stars
from 279 · score 0.69