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.
Awakenchan / LanternEngine
Lantern Engine: run your own copy of Bloodborne on Windows. A launcher and engine where the game's code runs natively; bring your own game dump.
icsharpcode / ILSpy
Cross-platform .NET assembly browser and decompiler that turns compiled assemblies back into readable C#.
QuantConnect / Lean
Lean Algorithmic Trading Engine by QuantConnect (Python, C#)
Tyrrrz / YoutubeDownloader
Downloads videos and playlists from YouTube
OpenRA / OpenRA
Open-source real-time strategy engine that runs early Westwood classics like Command & Conquer: Red Alert on modern systems.
CAPCOM-TD-OSS / REDox
High-performance, token-based structured data engine for .NET. A core component of REX, the technology behind CAPCOM's next-generation game engine.
aethai / ro3emu-server
Open-source Ragnarok Online 3 (RO3) PC server emulator in C# / .NET 10. Client-documented protocol, multiplayer systems, tools and research.
VlcekM / MeitouClient
Open-source reimplementation of the Kenshi engine in C# / .NET 10 (Vulkan renderer first). Needs your own copy of Kenshi.
lively-community / lively
Free and open-source software that allows users to set animated desktop wallpapers and screensavers powered by WinUI 3.
MonoGame / MonoGame
One framework for creating powerful cross-platform games.
SamboyCoding / Cpp2IL
Work-in-progress tool that reverses Unity's IL2CPP build output back into managed .NET DLLs.
ProwlEngine / Prowl
An Open Source C# 3D Game Engine under MIT license, inspired by Unity and featuring a complete editor
ZYY817 / YuqiEngine
宇奇引擎 - 游戏性能优化工具
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
BYTEX-TRADE / bytex
Event-driven algorithmic trading engine for .NET. Write a strategy once and run it unchanged in backtest, paper and live trading, deterministic, with fixed-point money and adapters for Binance, Bybit, OKX, Kraken, Bitget, Gate, KuCoin and Hyperliquid.
itsnik-scrpt / FigmaBridge
Figma-to-Engine UI Pipeline: Figma Auto-Layout → Unity UI Toolkit (UMG & Godot on roadmap) via WebSocket hot-reload and an IR layout compiler
StockSharp / StockSharp
Algorithmic trading and quantitative trading open source platform to develop trading robots (stock markets, forex, crypto, bitcoins, and options).
AssetRipper / AssetRipper
GUI application that extracts and converts assets from Unity game files into the native Unity engine format for analysis.
stride3d / stride
Stride (formerly Xenko), a free and open-source cross-platform C# game engine.
timschneeb / GalaxyBudsClient
Unofficial Galaxy Buds Manager for Windows, macOS, Linux, and Android
IvanMurzak / Unity-MCP
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.
Tyrrrz / YoutubeExplode
Abstraction layer over YouTube's internal API
isadorasophia / murder
Murder is a pixel art ECS game engine.
4sval / FModel
Unreal Engine Archives Explorer
uxmal / reko
Reko is a binary decompiler.
ppy / osu-framework
A game framework written with osu! in mind.
zengzhan / qqzeng-ip
👑 qqzeng-ip/QZDB 极速IP解析引擎 | Next-gen High-Performance IP Lookup Engine (IPv4 & IPv6). Supports LPM, zero-allocation SDKs (C/Rust/Go/Java/C#/NodeJS/Python/PHP) & DBMS scripts.
ariacom / Seal-Report
Database Reporting Tool and Tasks (.Net)
WolvenKit / WolvenKit
Community Mod editor/creator for REDengine games.
AlexWan / OsEngine
Open Source algo trading platform
FosterFramework / Foster
A small C# game framework
friflo / Friflo.Engine.ECS
High-performance C# ECS
MikuLeaks / MikuSB
Open-source C#/.NET research server emulator for local protocol and networking experimentation.
C7-Game / OpenCiv3
OpenCiv3 is an open-source, cross-platform, mod-oriented, modernized remake of Civilization III by the fan community built with the Godot Engine and C#, with capabilities inspired by the best of the 4X genre and lessons learned from modding Civ3.
clawdotnet / openclaw.net
Self-hosted Enterprise and Personal AI + agent runtime in .NET (NativeAOT-friendly)
freezy / VisualPinball.Engine
:video_game: Visual Pinball Engine for Unity
Shmellyorc / Void
A modular, extensible 2D game framework for .NET.
nautilusbits / mdk-sdl
Port of MDK (Shiny Entertainment, 1997) to C# and SDL3, based on reverse engineering: stereo 3D, VR viewer (Cardboard) on Android and desktop, gamepads - work in progress
drJhonatan00 / 3DS-EB
3DS-EB is a complete ground-up C# re-engineering of Asia81's HackingToolkit9DS, built to deliver maximum speed, a clean interface, and seamless 3DS ROM extraction/rebuilding without the performance bottlenecks of the original toolchain.
elsa-workflows / elsa-core
The Workflow Engine for .NET
danielgerlag / workflow-core
Lightweight workflow engine for .NET Standard
kurrent-io / KurrentDB
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.
dotnet / msbuild
The Microsoft Build Engine (MSBuild) is the build platform for .NET and Visual Studio.
liangxiegame / QFramework
Godot/Unity3D System Design Architecture
dotnetcore / FreeSql
.NET aot orm, VB.NET/C# orm, Mysql/PostgreSQL/SqlServer/Oracle orm, Sqlite/Firebird/Clickhouse/DuckDB orm, 达梦/金仓/虚谷/翰高/高斯 orm, 神通 orm, 南大通用 orm, 国产 orm, TDengine orm, QuestDB orm, MsAccess orm.
SteveTheKiller / KillerPDF
Free and open-source PDF editor for Windows with a built-in PDF 2.0 engine. View, annotate, OCR, merge, split, crop, rotate, compare, edit text, draw, sign, fill forms, print, flatten, and open password-protected PDFs without a subscription.
ravendb / ravendb
ACID Document Database
scriban / scriban
A fast, powerful, safe and lightweight scripting language and engine for .NET
Revolutionary-Games / Thrive
The main repository for the development of the evolution game Thrive.
evolutionary-architecture / evolutionary-architecture-by-example
Navigate the complex landscape of .NET software architecture with our step-by-step, story-like guide. Unpack the interplay between modular monoliths, microservices, domain-driven design, and various architectural patterns. Go beyond the one-size-fits-all solutions and understand how to blend these approaches based on your unique needs.
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.
Interkarma / daggerfall-unity
Open source recreation of Daggerfall in the Unity engine
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.
FastReports / FastReport
Free Open Source Reporting tool for .NET6/.NET Core/.NET Framework that helps your application generate document-like reports
hadashiA / VContainer
The extra fast, minimum code size, GC-free DI (Dependency Injection) library running on Unity Game Engine.
bepu / bepuphysics2
Pure C# 3D real time physics simulation library, now with a higher version number.
YarnSpinnerTool / YarnSpinner
The core compiler and engine-agnostic components for Yarn Spinner, the friendly dialogue tool.
ErikEJ / EFCorePowerTools
Entity Framework Core Power Tools - reverse engineering, migrations and model visualization in Visual Studio & CLI
Alex-Rachel / TEngine
Unity 商用级别开发框架，原生内置 AI 工作流支持，集成 HybridCLR 高性能热更、Obfuz 代码混淆加固、YooAssets 企业级资源管理方案，构建高效、安全、可扩展的工业化开发底座。