Ceph is a distributed object, block, and file storage platform

LizardFS is an Open Source Distributed File System licensed under GPLv3.

U++ is a C++ cross-platform rapid application development framework focused on programmer's productivity. It includes a set of libraries (GUI, SQL, Network etc.), and integrated development environment (TheIDE).

An x86 monolithic kernel and operating system written in modern C++. Comes with in-house graphical applications and command line utilities, plus ports of existing software. And yes, it runs DOOM!

Neo-InitWare is a modular, cross-platform reimplementation of the systemd init system. It is experimental.

Maybe the world's fastest logging library, originating from the client of the top mobile game Honor of Kings, is lightweight, works on PC, mobile, and servers, supports C#, Java, and C++, and is well adapted to Unity and Unreal engines. 可能是全球最快的日志库，源自最成功的手游之一《王者荣耀》客户端，轻量级，适用于PC、移动设备和服务器，支持C#、Java、C++，并对Unity、Unreal引擎做了良好适配。

从零开始实现一个聊天室客户端（用qt实现,在Windows和Linux环境下都行），和在Linux下实现服务器后台

Public repository for the BeeGFS Parallel File System

an operating system for the Raspberry Pi Pico

std C++ 11 library impementation with extra features using only C++ 98 and POSIX threads

Header-only C/C++ IPC for Windows, Linux and macOS.

Signal handler for multi threaded C++ applications on Linux

Build automation

Wrapper of LittleFS for Arduino MBED RP2040 boards. This library facilitates your usage of LittleFS for the onboard flash. LittleFS supports power fail safety and high performance

Monophone Terminal Multiplexer - Less intrusive than tmux, smarter than screen

A modular POSIX-like operating system created for educational purposes

Some missing bits of POSIX for macOS.

Operating System focused on asynchronicity, minimalism, and performance.

reference implementation of mROS 2 for POSIX layer

A c++ POSIX signal handler wrapper library