A modern, C++-native, test framework for unit-tests, TDD and BDD - using C++14, C++17 and later (C++11 support is in v2.x branch, and C++03 on the Catch1.x branch)

Gaming meets modern C++ - a fast and reliable entity component system (ECS) and much more

Static reflection for enums (to string, from string, iteration) for modern C++, work with any enum type without any macro or boilerplate code

CLI11 is a command line parser for C++11 and beyond that provides a rich feature set with a simple and intuitive interface.

Nameof operator for modern C++, simply obtain the name of a variable, type, function, macro, and enum

Header-only TOML config file parser and serializer for C++17.

Fast & memory efficient hashtable based on robin hood hashing for C++11/14/17/20

C++11 Lightweight Redis client: async, thread-safe, no dependency, pipelining, multi-platform - NO LONGER MAINTAINED - Please check /~https://github.com/cpp-redis/cpp_redis

Static reflection for C++17 (compile-time enumeration, attributes, proxies, overloads, template functions, metaprogramming).

A fast & densely stored hashmap and hashset based on robin-hood backward shift deletion

a compile-time, header-only, dimensional analysis and unit conversion library built on c++14 with no dependencies.

gsl-lite – A single-file header-only version of ISO C++ Guidelines Support Library (GSL) for C++98, C++11, and later

The fastest RISC-V sandbox

The smallest public printf implementation for its feature set.

Platform Abstraction C++ Libraries

span lite - A C++20-like span for C++98, C++11 and later in a single-file header-only library

expected lite - Expected objects in C++11 and later in a single-file header-only library

SummerTTS 是一个基于C++的独立编译的中文和英文语音合成项目，可以本地运行不需要网络，而且没有额外的依赖，一键编译完成即可用于中文和英文的语音合成。SummerTTS is a standalone Chinese and English speech synthesis(TTS) project that has almost no dependency and could be easily used for Chinese TTS with just one key build out

string_view lite - A C++17-like string_view for C++98, C++11 and later in a single-file header-only library

optional lite - A C++17-like optional, a nullable object for C++98, C++11 and later in a single-file header-only library