c++20

fast_iocppfastio/fast_io

A freestanding C++20 input/output library designed to replace <iostream> and <cstdio> with exceptional performance.

ArkScriptArkScript-lang/Ark

A small, fast, functional, and embeddable scripting language for C++ projects with Lisp-like syntax.

CNLjohnmcfarlane/cnl

A C++ library providing fixed-precision numeric types for safer, simpler, and more efficient arithmetic in constrained environments.

Koala Enginephisko/kengine

A C++20 game engine built on EnTT's Entity-Component-System architecture, focusing on ease-of-use, runtime extensibility, and compile-time type safety.

Reactionlumia431/reaction

A lightweight, header-only, high-performance reactive programming framework for C++20, bringing React/Vue-style dataflow to native applications.

AUIaui-framework/aui

A cross-platform, high-performance UI toolkit for building hardware-accelerated desktop applications with modern C++20.

neoGFXi42output/neogfx

A cross-platform GPU-oriented C++ application and game framework for building performant UIs and graphics using modern GPUs.

fixed-containersteslamotors/fixed-containers

A header-only C++20 library providing fixed-capacity, constexpr containers with identical APIs to their std equivalents.

Auaurora-opensource/au

A C++14-compatible physical units library with no dependencies, focusing on safety, performance, and developer experience.

Graafbobluppes/graaf

A lightweight, header-only C++20 graph library designed as a simpler alternative to the Boost Graph Library.

Briskbrisklib/brisk

A modern C++20 GUI framework with MVVM architecture, reactive capabilities, and hardware-accelerated GPU rendering for cross-platform applications.

TinyORMsilverqx/TinyORM

A modern C++20 ORM library with a powerful query builder, support for multiple databases, migrations, and a Qt-compatible API.

DemoFrameworkNXPmicro/gtec-demo-framework

A C++20 cross-platform demo framework for graphics and compute APIs like Vulkan, OpenGL ES, OpenVX, OpenCL, OpenVG, and OpenCV.

snitchcschreib/snitch

A lightweight C++20 testing framework focused on minimal heap allocation and fast compilation.

Timsortgfx/cpp-TimSort

A C++20 implementation of TimSort, a stable O(n log n) sorting algorithm optimized for partially-sorted data.

dispensofacebookincubator/dispenso

A high-performance C++ thread pool and parallel algorithms library for compute-bound workloads, designed as a sanitizer-clean alternative to OpenMP and TBB.

TooManyCookstzcnt/TooManyCooks

A high-performance C++20 concurrency framework with lock-free work-stealing thread pools, Asio integration, and simple coroutine syntax.

barkeepoir/barkeep

A single-header C++ library for displaying async animations, counters, progress bars, and status messages with minimal code changes.

Ichorvolt-software/ichor

A C++20 microservice bootstrapping framework focused on dependency injection, event queueing, and thread confinement for high-performance, low-latency applications.

rppTheNumbat/rpp

A minimal Rust-inspired C++20 standard library replacement focused on fast compilation, debuggability, and explicit code.

Protocol PuffersPragmaTwice/protopuf

A header-only C++20 library for Protocol Buffers serialization/deserialization using C++ types instead of .proto files.

sqlgengetml/sqlgen

A modern, type-safe ORM and SQL query generator for C++20, inspired by SQLAlchemy and Diesel.

SuperfamiconvOptiroc/SuperFamiconv

A flexible and composable command-line tile graphics converter for classic game consoles like SNES, Game Boy, and Mega Drive.

emioViatorus/emio

A safe, fast, and tiny character I/O library for bare-metal and RTOS embedded systems with high-level formatting and low-level control.

dynamic_bitsetpinam45/dynamic_bitset

A C++17/20 header-only dynamic bitset library for efficient bit manipulation with optional libpopcnt optimization.

spyjfalcou/spy

A C++20 library that replaces preprocessor macros with constexpr detection of compilers, architectures, SIMD extensions, and operating systems.

sfl libraryslavenf/sfl-library

A header-only C++11/20 library providing specialized containers like static_vector, small_vector, and flat_map for performance and embedded use.

luacxxdafrito/luacxx

A modern C++ library for binding C and C++ code to Lua, designed to work directly with the Lua C API.

constexpr-sqlmkitzan/constexpr-sql

A header-only C++20 library that parses and plans SQL queries at compile time using constexpr metaprogramming.

OpenCrystalCavesOpenCrystalCaves/OpenCrystalCaves

An unofficial open-source engine reimplementation of the classic game trilogy Crystal Caves, with modern improvements.

logfaultjgaa/logfault

A header-only C++ logging library for cross-platform applications, supporting native logging on macOS, iOS, Android, Linux, Windows, and Qt.

UltrafastSecp256k1shrec/UltrafastSecp256k1

Ultra high-performance secp256k1 ECC engine with GPU acceleration, continuous adversarial audit, and multi-language bindings.

Txeordabra/txeo

A lightweight, high-performance C++ wrapper for TensorFlow that simplifies development with a modern API.

influxdb-cpp-restd-led/influxdb-cpp-rest

A modern C++20 client library for InfluxDB with synchronous and asynchronous APIs, plus a C wrapper.

simple_enumarturbac/simple_enum

A fast, intuitive, and type-safe C++ library for enhanced enumeration support with minimal compile-time overhead.

wspppinwhell/wspp

A modern, header-only C++20 WebSocket library for building RFC 6455 compliant clients and servers with async, non-blocking I/O.