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) discord.gg/4CWS9zD

Parsing gigabytes of JSON per second : used by Facebook/Meta Velox, the Node.js runtime, ClickHouse, WatermelonDB, Apache Doris, Milvus, StarRocks simdjson.org

Fast C++ logging library.

Port of http_parser to llparse llhttp.org

Cross-platform asynchronous I/O libuv.org/

JSON for Modern C++ json.nlohmann.me