ahwootech / BRUTAL
A free, open source C# framework for making games, or your own game engine. Direct access to native APIs and Vulkan, with the low-level libraries around them. The foundation under Kitten Space Agency and RimWorld's Waylith engine.
bitwarden / server
Backend APIs, SQL Server database, and Docker deployment tooling for the Bitwarden password manager clients.
jellyfin / jellyfin
The Free Software Media System - Server Backend & API
Orbmu2k / nvidiaProfileInspector
Windows tool for viewing and editing NVIDIA driver profiles and hidden driver settings via the NVIDIA Driver Settings API.
SakiRinn / LiveCaptions-Translator
Windows desktop app that pipes Windows LiveCaptions speech text into translation APIs for real-time subtitle translation.
gibbed / SteamAchievementManager
A manager for game achievements in Steam.
JustArchiNET / ArchiSteamFarm
C# application with primary purpose of farming Steam cards from multiple accounts simultaneously.
VedAstro / VedAstro
A non-profit, open source project to make Vedic Astrology easily available to all.
zhongkaifu / TensorSharp
A native .NET LLM inference engine and agent runtime for GGUF models. TensorSharp provides a console application, a web-based chatbot interface, iPhone App, and Ollama/OpenAI-compatible HTTP APIs for programmatic access. It supports Windows/MacOS/iOS/Linux with full GPU capability
Jackett / Jackett
API Support for your favorite torrent trackers
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.
mono / SkiaSharp
SkiaSharp is a cross-platform 2D graphics API for .NET platforms based on Google's Skia Graphics Library. It provides a comprehensive 2D API that can be used across mobile, server and desktop models to render images.
Tyrrrz / YoutubeExplode
Abstraction layer over YouTube's internal API
TelegramBots / Telegram.Bot
.NET Client for Telegram Bot API
openai / openai-dotnet
The official .NET library for the OpenAI API
nhibernate / nhibernate-core
NHibernate Object Relational Mapper
lookup-foundation / RevitLookup
Interactive Revit database exploration tool
dotnet / dotnet-api-docs
.NET API reference documentation (.NET 8+)
microsoft / mcp-gateway
MCP Gateway is a reverse proxy and management layer for MCP servers, enabling scalable, session-aware stateful routing and lifecycle management of MCP servers in Kubernetes environments.
V1ck3s / octo-fiesta
A Subsonic API proxy server that transparently integrates multiple music streaming providers as sources.
clawdotnet / openclaw.net
Self-hosted Enterprise and Personal AI + agent runtime in .NET (NativeAOT-friendly)
Zsh123456-BOOP / stardew-together
同行 · Together — 面向自主经营、任务与全成就推进的 Stardew Valley AI Agent。原生工具、持续计划、游戏记忆与玩家辅助。
cronwatchdev / cronwatch
CronWatch records every run of your scheduled jobs in your own database, and speaks up when one is missed, fails, gets stuck, runs slow or costs too much. CronWatch is free and open-source.
jasontaylordev / CleanArchitecture
Clean Architecture Solution Template for ASP.NET Core
restsharp / RestSharp
Simple REST and HTTP API Client for .NET
reactiveui / refit
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.
ThreeMammals / Ocelot
.NET API Gateway
fullstackhero / dotnet-starter-kit
Production Grade Cloud-Ready .NET 10 Starter Kit (Web API + React Client) with Multitenancy Support, and Clean/Modular Architecture that saves roughly 200+ Development Hours! All Batteries Included.
MirrorNetworking / Mirror
#1 Open Source Unity Networking Library
nissl-lab / npoi
a .NET library that can read/write Office formats without Microsoft Office installed. No COM+, no interop.
FastEndpoints / FastEndpoints
A light-weight REST API development framework for ASP.NET 8 and newer.
graphql-dotnet / graphql-dotnet
GraphQL for .NET
tModLoader / tModLoader
A mod to make and play Terraria mods. Supports Terraria 1.4 (and earlier) installations
domaindrivendev / Swashbuckle.AspNetCore
Swagger tools for documenting API's built on ASP.NET Core
Cysharp / MagicOnion
Unified Realtime/API framework for .NET platform and Unity.
dotnet / docfx
Static site generator for .NET API documentation.
hardkoded / puppeteer-sharp
Headless Chrome .NET API
microsoft / kiota
OpenAPI based HTTP Client code generator
discord-net / Discord.Net
An unofficial .Net wrapper for the Discord API (https://discord.com/)
dotnet / aspnet-api-versioning
Provides a set of libraries which add service API versioning to ASP.NET Core Minimal APIs, Controllers, gRPC, OData, and Web API (Classic).
EasyNetQ / EasyNetQ
An easy to use .NET API for RabbitMQ
nodatime / nodatime
A better date and time API for .NET
dotnetcore / osharp
OSharp是一个基于.Net6.0的快速开发框架，框架对 AspNetCore 的配置、依赖注入、日志、缓存、实体框架、Mvc(WebApi)、身份认证、功能权限、数据权限等模块进行更高一级的自动化封装，并规范了一套业务实现的代码结构与操作流程，使 .Net 框架更易于应用到实际项目开发中。
Pathoschild / SMAPI
The modding API for Stardew Valley.
Unity-Technologies / com.unity.netcode.gameobjects
Netcode for GameObjects is a high-level netcode SDK that provides networking capabilities to GameObject/MonoBehaviour workflows within Unity and sits on top of underlying transport layer.
monksoul / Furion
让 .NET 开发更简单，更通用，更流行。
PiranhaCMS / piranha.core
Piranha CMS is the friendly editor-focused CMS for .NET that can be used both as an integrated CMS or as a headless API.
dahall / Vanara
A set of .NET libraries for Windows implementing PInvoke calls to many native Windows APIs with supporting wrappers.
MichaelGrafnetter / DSInternals
Directory Services Internals (DSInternals) PowerShell Module and Framework
dotnet / dotNext
Next generation API for .NET
fudiwei / DotNetCore.SKIT.FlurlHttpClient.Wechat
可能是全网最完整的 C# 版微信 SDK，封装全部已知的微信 OpenAPI，包含微信公众平台（订阅号+服务号+小程序+小游戏+小商店+视频号）、微信开放平台、微信商户平台（微信支付+微企付）、企业微信、微信广告平台、微信智能对话开放平台等模块，可跨平台。持续随官方更新，欢迎 Star/Fork/PR。QQ 交流群 875580418【满】、930461548【满】、611974621。
NewLifeX / X
Core basic components: log (file / network), configuration (XML / JSON / HTTP), cache (memory / redis), network (TCP / UDP / HTTP), RPC framework, serialization (binary / XML / JSON), APM performance tracking. 核心基础组件，日志（文件/网络）、配置（XML/Json/Http）、缓存（内存/Redis）、网络（Tcp/Udp/Http）、RPC框架、序列化（Binary/XML/Json）、APM性能追踪。
smartstore / Smartstore
A modular, scalable and ultra-fast open-source all-in-one eCommerce platform built on ASP.NET Core 10
nhibernate / fluent-nhibernate
Fluent NHibernate!
aws / aws-lambda-dotnet
Libraries, samples and tools to help .NET Core developers develop AWS Lambda functions.
collinbarrett / FilterLists
:shield: The independent, comprehensive directory of filter and host lists for advertisements, trackers, malware, and annoyances.
microsoft / OpenAPI.NET
The OpenAPI.NET SDK contains a useful object model for OpenAPI documents in .NET along with common serializers to extract raw OpenAPI JSON and YAML documents from the model.
Azure / data-api-builder
Data API builder provides modern REST, GraphQL endpoints and MCP tools to your Azure Databases and on-prem stores.
googleapis / google-api-dotnet-client
Google APIs Client Library for .NET
microsoft / ai-dev-gallery
An open-source project for Windows developers to learn how to add AI with local models and APIs to Windows apps.