• unity3d - commercial cross-platform game engine
• godot - 2D and 3D cross-platform game engine
• UnrealEngine - Unreal Engine source code
• cocos2d-x - Cocos2d-x is a suite of open-source, cross-platform, game-development tools used by millions of developers all over the world.

UI Test Automation Scripting

• amethyst - (rust) amethyst - Data-oriented and data-driven game engine written in Rust
• bevy - a refreshingly simple data-driven game engine built in Rust. It is free and open-source forever!
• piston - (rust) piston - A modular game engine written in Rust
• godot - (cpp) Godot Engine – Multi-platform 2D and 3D game engine

UI Test Automation Scripting

• hunter
• conan
• buckaroo

Language Tutorials

• vcpkg
• cargo

3D Creation Tools

• Maya - 3D computer animation, modeling, simulation, and rendering software
• 3DSMax - 3D modeling and rendering software for design visualization, games, and animation
• cinema4d - 3D computer animation, modeling, simulation, and rendering software
• blender - Open source 3D creation. Free to use for any purpose, forever.

Vendor Graphics API/SDK

• directx - a set of APIs that you can use to create games and other high-performance multimedia applications.
• metal - a low-level, low-overhead hardware-accelerated 3D graphic and compute shader API created by Apple.
• opengl - The Industry's Foundation for High Performance Graphics
• opengl-es - The Standard for Embedded Accelerated 3D Graphics
• nvidia-sdk
• vulkan - an open standard and cross-platform Application Programming Interface (API) developed by the Khronos® Group.

Landscape, World

• BrushFy - [The #1 Environment Toolkit for Unreal Engine 4](https://youtu.be/pH0Sq58ZpSo)
• RVT landscape - [How to create a terrain in UE4 with RVT Optimized for Open-World](https://youtu.be/KazQVWYwKAI)
• Voxel Plugin - [allows to create fully volumetric, entirely destructible, infinite worlds in Unreal Engine. It is compatible with 4.24, 4.25, 4.26, 4.27 and Unreal 5.](https://youtu.be/hqhHRdcakv4)
• SpeedTree - [an Award-winning 3D Procedural vegetation middleware product with fine-tuned art controls. Includes Modeler, Compiler, Tree Library and full-source SDK.](https://youtu.be/O3tu926ykvM)
• TrueSky - [The ultimate real-time weather renderer, as seen in popular AAA game titles.](https://youtu.be/rYSM40OaP20)
• RVT landscape - [How to create a terrain in UE4 with RVT Optimized for Open-World](https://youtu.be/KazQVWYwKAI)
• Voxel Plugin source
• RVT landscape - [How to create a terrain in UE4 with RVT Optimized for Open-World](https://youtu.be/KazQVWYwKAI)

3D Rendering Library

• bgfx - Cross-platform rendering library
• bgfx-rs - Rust bindings to bgfx, a cross-platform, graphics API agnostic, "Bring Your Own Engine/Framework" style rendering library.

Triangles , Geometry , Maths , Physics

• libigl/libigl - Simple C++ geometry processing library.
• google/mathfu - C++ math library developed primarily for games focused on simplicity and efficiency.

Graphics Asset Import

• fbx animation - ?

Graphics Rendering Libraries/Frameworks

• yocto-gl - Tiny C++ Libraries for Data-Oriented Physically-based Graphics
• dilligent engine - A Modern Cross-Platform Low-Level 3D Graphics Library and Rendering Framework

Landscape, World

• EQS

2D Creation,Editing Tools

• Adobe Photoshop

?

• live++

C++ Data Structures and Algorithms

• CopperSpice - a set of individual libraries which can be used to develop cross platform software applications in C++.
• intel oneAPI TBB
• abseil - Abseil Common Libraries (C++)
• facebook/folly - An open-source C++ library developed and used at Facebook.
• libcds - a collection of concurrent containers that don't require external (manual) synchronization for shared access, and safe memory reclamation (SMR) algorithms like Hazard Pointer and user-space RCU that is used as an epoch-based SMR.
• c++ stl

UI Test Automation Scripting

• python

Logic Scripts

• ChaiScript/ChaiScript - Embedded Scripting Language Designed for C++

C++ Data Structures and Algorithms

• xorz57/forest - Template Library of Tree Data Structures in C++17
• cameron314/concurrentqueue - A fast multi-producer, multi-consumer lock-free concurrent queue for C++11
• orlp/pdqsort - Pattern-defeating quicksort.
• timesort/cpp-TimeSort - A C++ implementation of timsort
• greg7mdp/sparsepp - A fast, memory efficient hash map for C++
• mandliya/algorithms_and_data_structures - 180+ Algorithm & Data Structure Problems using C++
• xtaci/algorithms - Algorithms & Data structures in C++.
• mattreecebentley/plf_list - A std::list implementation which removes range splicing in order to enable cache-friendlier structure, yielding significant performance gains. [zLib]
• mattreecebentley/plf_stack - A C++ data container replicating std::stack functionality but with better performance than standard library containers in a stack context.
• Tessil/robin-map - C++ implementation of a fast hash map and hash set using robin hood hashing
• Tessil/robin-hood-hashing - Fast & memory efficient hashtable based on robin hood hashing for C++11/14/17/20

c++

• Neargye/magic-enum
• Neargye/nameof
• aantron/better-enums - C++ compile-time enum to string, iteration, in a single header file

Reactive

• ReactiveX/RxCpp - Reactive Extensions for C++
• schlangster/cpp.react - C++React: A reactive programming library for C++11.

Unit Tests

• laboratory - A simple, expressive unit test framework
• rstest - Fixture-based test framework

Property Testing

• proptest - a property testing framework inspired by the Hypothesis framework for Python
• quickchceck - a way to do property based testing using randomly generated input.

Coverage Testing

• tarpaulin - a code coverage reporting tool for the Cargo build system, named for a waterproof cloth used to cover cargo on a ship

Load Testing

• drill - a HTTP load testing application

Concurrent

• loom - a testing tool for concurrent Rust code.

Fuzz Testing

• afl - a popular, effective, and modern fuzz testing tool based on AFL.

fake data

• fake - A Rust library for generating fake data.

ORM

• pijul - [why pijul?](https://pijul.com/manual/why_pijul.html)

ORM

• rx - a modern and minimalist pixel editor

Saving/Loading Objects, Compositing Packets

• google/flatbuffers - FlatBuffers: Memory Efficient Serialization Library
• simdjson/simdjson - Parsing gigabytes of JSON per second
• Tencent/rapidjson - A fast JSON parser/generator for C++ with both SAX/DOM style API
• danielparker/jsoncons - A C++, header-only library for constructing JSON and JSON-like data formats, with JSON Pointer, JSON Patch, JSONPath, CSV, MessagePack, CBOR, BSON, UBJSON
• fraillt/bitsery - Header only C++ binary serialization library. It is designed around the networking requirements for real-time data delivery, especially for games.
• msgpack/msgpack-c - MessagePack implementation for C and C++ / msgpack.org[C/C++]

Tokenizer

• NVIDIAGameWorks/Physx-3.4 - An open-source realtime physics engine middleware SDK developed by Nvidia as a part of Nvidia GameWorks software suite. [BSD-3-Clause]

UI Test Automation Scripting

• bullet
• havok

Tokenizer

• google/re2 - RE2 is a fast, safe, thread-friendly alternative to backtracking regular expression engines like those used in PCRE, Perl, and Python. It is a C++ library.
• fmtlib/fmt

ORM

• engine sound - a GUI Application used to generate purely synthetic engine sounds with advanced options

UI Test Automation Scripting

• lewissbaker/cppcoro - A library of C++ coroutine abstractions for the coroutines TS

UI Test Automation Scripting

• libuv/libuv - Cross-platform asynchronous I/O
• skypjack/uvw - Header-only, event based, tiny and easy to use libuv wrapper in modern C++

benchmark

• boostorg/beast - HTTP and WebSocket built on Boost.Asio in C++11
• chriskohlhoff/asio - Asio C++ Library

UI Test Automation Scripting

• scylladb/seastar - High performance server-side application framework
• pocoproject/poco - C++ class libraries and frameworks for building network- and internet-based applications that run on desktop, server, mobile and embedded systems. [Boost]
• uNetworking/uWebSockets - Simple, secure & standards compliant web server for the most demanding of applications

benchmark

• chenshuo/muduo - Event-driven network library for multi-threaded Linux server in C++11

UI Test Automation Scripting

• amqpcpp

UI Test Automation Scripting

• grpc/grpc - The C based gRPC (C++, Python, Ruby, Objective-C, PHP, C#)

UI Test Automation Scripting

• microsoft/cpprestsdk - The C++ REST SDK is a Microsoft project for cloud-based client-server communication in native code using a modern asynchronous C++ API design. This project aims to help C++ developers connect to and interact with services.

fake data

• mrtazz/restclient-cpp - C++ client for making HTTP/REST requests
• jpbarrette/curlpp - C++ wrapper around libcURL
• yhirose/cpp-httplib - A C++ header-only HTTP/HTTPS server and client library

UI Test Automation Scripting

• microsoft/mimalloc - A compact general purpose allocator with excellent performance. [MIT]

UI Test Automation Scripting

• facebook/zstd - Zstandard - Fast real-time compression algorithm

UI Test Automation Scripting

• jedisct1/libsodium - A modern, portable, easy to use crypto library
• randombit/botan - Cryptography Toolkit
• weidai11/cryptopp - free C++ class library of cryptographic schemes

UI Test Automation Scripting

• catchorg/Catch2 - A modern, C++-native, header-only, test framework for unit-tests, TDD and BDD - using C++11, C++14, C++17 and later (or C++03 on the Catch1.x branch)

UI Test Automation Scripting

• danmar/cppcheck - static analysis of C/C++ code

UI Test Automation Scripting

• PlatformLab/NanoLog - an extremely performant nanosecond scale logging system for C++ that exposes a simple printf-like API.
• odygrd/quill - Asynchronous Low Latency Logging Library
• gabime/spdlog - Fast C++ logging library.

fake data

• yse/easy_profiler - Lightweight profiler library for c++

UI Test Automation Scripting

• arrayfire/arrayfire - ArrayFire: a general purpose GPU library.
• cpp-taskflow/cpp-taskflow - Modern C++ Parallel Task Programming

UI Test Automation Scripting

• aws/aws-sdk-cpp - AWS SDK for C++

UI Test Automation Scripting

• BVLC/caffe - Caffe: a fast open framework for deep learning.

UI Test Automation Scripting

• google/libphonenumber - Google's common Java, C++ and JavaScript library for parsing, formatting, and validating international phone numbers.

UI Test Automation Scripting

• dmitigr/pgfe - The PostgreSQL client API in modern C++

UI Test Automation Scripting

• postgres/postgres - The World's Most Advanced Open Source Relational Database
• scylladb/scylla - NoSQL data store using the seastar framework, compatible with Apache Cassandra

ORM

• diesel - A safe, extensible ORM and Query Builder

ORM

• Tencent/phxpaxos - The Paxos library implemented in C++ that has been used in the WeChat production environment.

UI Test Automation Scripting

• actix/actix - Actor framework for Rust
• amethyst/specs - Specs - Parallel ECS https://specs.amethyst.rs/
• skypjack/entt - Gaming meets modern C++ - a fast and reliable entity component system (ECS) and much more
• actor-framework/actor-framework - An Open Source Implementation of the Actor Model in C++
• Stiffstream/sobjectizer - An implementation of Actor, Publish-Subscribe, and CSP models in one rather small C++ framework. With performance, quality, and stability proved by years in the production.

Networked Objects - Synchronization

• backroll - pure Rust implementation of GGPO rollback networking library.

Saving/Loading Objects, Compositing Packets

• marzer/tomlplusplus - Header-only TOML config file parser and serializer for modern C++.
• capnproto/capnproto - Cap'n Proto serialization/RPC system - core tools and C++ library
• USCiLab/cereal - A C++11 library for serialization
• zeux/pugixml - Light-weight, simple and fast XML parser for C++ with XPath support
• serde - a framework for serializing and deserializing Rust data structures efficiently and generically.
• nom - a parser combinators library written in Rust

Finite State Machine

• andrew-gresylk/HFSM2 - High-Performance Hierarchical Finite State Machine Framework
• zmij/afsm - C++14 Finite State Machine library
• google/statechart - C++ StateChart Library

Concurrency & Parallelism

• thrust - a parallel algorithms library which resembles the C++ Standard Template Library (STL)

Tween

• iced - A cross-platform GUI library focused on simplicity and type-safety. Inspired by Elm.
• tauri - a framework for building tiny, blazing fast binaries for all major desktop platforms
• sauron-native - conquers all platforms ranging from desktop to mobile devices. An attempt to create a truly native, truly cross platform UI for your rust applications.

Native UI

• fyne-io/fyne - Cross platform GUI in Go based on Material Design https://fyne.io/

Front-end Web App

• yew - a modern Rust framework for creating multi-threaded front-end web apps with WebAssembly.

data parallel

• rayon - a data-parallelism library for Rust.

File I/O

• bin_io - a crate inspired greatly by nom and other parser combinator libraries.
• mandreyel/mio - Cross-platform C++11 header-only library for memory mapped file IO

Network I/O

• mio - a fast, low-level I/O library for Rust focusing on non-blocking APIs and event notification for building high performance I/O apps with as little overhead as possible over the OS abstractions.
• tokio - n event-driven, non-blocking I/O platform for writing asynchronous applications with the Rust programming language.

benchmark

• rust-io-file-benchmark - a short report on the performance metrics obtained processing large files with a small rust/python script.

benchmark

• actix/actix-web - Actix web is a small, pragmatic, and extremely fast rust web framework.
• ipkn/crow - Crow is very fast and easy to use C++ micro web framework (inspired by Python Flask)
• oktal/pistache - Pistache is a C++ REST framework written in pure C++11 with no external dependency. [Apache2]

fake data

• TrinityCore/TrinityCore - TrinityCore Open Source MMO Framework (master = 8.3.0.34220, 3.3.5 = 3.3.5a.12340)
• ketoo/NoahgameFrame - A fast, scalable, distributed game server engine/framework for C++, include the actor library, network library, can be used as a real time multiplayer game engine ( MMO RPG/MOBA ), which support C#/Lua script/ Unity3d, Cocos2dx and plan to support Unreal.

fake data

• ermig1979/Simd - C++ image processing and machine learning library with using of SIMD: SSE, SSE2, SSE3, SSSE3, SSE4.1, SSE4.2, AVX, AVX2, AVX-512, VMX(Altivec) and VSX(Power7), NEON for ARM.

ORM

• arrow data fusion

ORM

• wry - Cross-platform WebView rendering librarythat supports all major desktop platforms like Windows, macOS, and Linux.

ORM

• deno - a simple, modern and secure runtime for JavaScript and TypeScript that uses V8

Language Tutorials

• cpp starter project
• CMake