Open-source alternatives to Os Tutorial

This project is an educational resource for developing bare-metal operating systems and kernels from scratch on Raspberry Pi hardware. It provides a structured guide to systems programming using the Rust language, focusing on the implementation of core kernel components that execute directly on ARM-based hardware without the support of an underlying operating system or standard library. The tutorials emphasize a modular architecture that separates hardware-independent kernel logic from processor-specific and board-specific configurations. By utilizing a hardware abstraction layer and distinct

Tock is a secure embedded operating system and microcontroller kernel designed to isolate untrusted applications and drivers. It functions as a memory-safe process isolator that uses a combination of hardware memory protection and language-level type safety to execute mutually distrustful applications on bare metal. The system distinguishes itself through a hardware abstraction layer that decouples high-level components from specific microcontroller implementations using standardized traits. It further employs a virtualization layer to allow multiple independent software components to share a

This project is a freestanding kernel written in Rust that boots on x86 hardware without a standard library. It serves as a low-level system implementation focusing on the creation of a bare metal operating system. The system implements a bootable disk image toolchain that transforms source code into binaries compatible with a bootloader. It features a custom memory allocator for dynamic memory management and an x86 kernel implementation that includes paging, interrupt handling, and VGA text mode. The project covers several core capability areas, including low-level memory management through

This project is a comprehensive educational framework designed to guide learners through the complexities of systems engineering and low-level software development. It provides structured learning paths that integrate hardware simulation, source code analysis, and project-based exercises to help developers master the foundational concepts of computer architecture, operating systems, and firmware design. The curriculum distinguishes itself by emphasizing direct interaction with system internals, requiring learners to examine and modify existing open-source kernel and driver implementations. By

CppGuide is a curated collection of educational resources and practical guides focused on C++ server development, Linux kernel internals, concurrent programming, network protocols, and security exploitation. It provides structured learning paths for backend developers, covering everything from interview preparation to building high-performance network servers and understanding operating system fundamentals. The guide distinguishes itself by offering in-depth, hands-on tutorials that walk through real-world implementations, including building a Redis-like server from scratch, designing custom

The Linux kernel is a monolithic operating system core that manages hardware resources, memory, and process scheduling across diverse computing architectures. It provides a standardized, POSIX-compliant environment for application execution while maintaining a modular driver framework that allows for the dynamic loading and removal of hardware interfaces. The project is distinguished by its high-performance concurrency toolkit, which utilizes lockless synchronization primitives and read-copy-update mechanisms to manage shared data access in multi-core environments. It incorporates a comprehen

This project is a comprehensive technical knowledge base designed to support developers in mastering systems programming and preparing for technical assessments. It provides a structured collection of fundamental computer science concepts, mapping high-level language constructs to low-level hardware memory layouts, runtime object lifecycles, and system-level operations. The repository distinguishes itself through a hierarchical approach that bridges the gap between theoretical principles and practical implementation. It offers detailed guidance on C++ language mechanisms, standard library usa

OpenWrt is a modular Linux distribution designed for resource-constrained networking hardware. It functions as a comprehensive network routing platform, providing a complete build environment that allows users to generate custom firmware images for a wide variety of embedded processor architectures. By utilizing a standardized cross-compilation toolchain and a package-based ecosystem, it enables the creation of tailored operating systems for specific hardware deployments. The project distinguishes itself through a hardware abstraction layer that normalizes interactions across diverse chipsets

Tinygrad is a deep learning framework and tensor computation engine designed for building and training neural networks. It functions as a hardware abstraction layer that manages device memory, command queues, and kernel dispatching across heterogeneous computing architectures. By utilizing a lazy-evaluation approach, the framework constructs computational graphs that defer execution until data is explicitly required, allowing it to process only the necessary operations for a given result. The project distinguishes itself through a just-in-time compilation layer that transforms abstract comput

This project is a terminal multiplexer that enables multiple terminal sessions to run simultaneously within a single window or a detached background process. By decoupling the client interface from a persistent server process, it allows users to maintain long-running command-line tasks that continue to execute even after disconnecting from a remote host. The system functions as a terminal window manager and process controller, providing a text-based interface to organize multiple shell processes into custom tiled layouts. It distinguishes itself through a programmable command-line interface t

This project serves as a centralized directory and resource hub for extending the functional capabilities of AI agents. It provides a structured collection of tools and integration patterns that enable large language models to interact with external software platforms, facilitating autonomous task execution and data retrieval across a wide range of business applications. The repository distinguishes itself by standardizing communication between AI models and external services through the Model Context Protocol. It utilizes declarative skill manifests and machine-readable tool-calling schemas

Zig is a general-purpose systems programming language designed for high-performance applications that require manual memory management and direct control over hardware resources. It prioritizes predictable execution by enforcing explicit control flow and requiring functions to accept explicit memory allocators, ensuring that all heap operations and logic paths remain visible to the developer. The language distinguishes itself through a powerful compile-time metaprogramming engine that allows for arbitrary code execution during the build process, enabling advanced reflection and the generation

30dayMakeOS is an educational hobby operating system project designed for the x86 architecture. It implements a monolithic kernel and a custom bootloader that transitions the CPU from real mode to 32-bit protected mode to enable flat memory addressing. The project focuses on low-level system development, featuring a custom graphics driver for direct pixel-buffer rendering and window management without an existing operating system. It includes an x86 bootloader that loads the kernel from disk into memory. The system covers core kernel capabilities including round-robin task scheduling for pro

V is a statically typed, compiled programming language designed for high-performance systems development. It prioritizes memory safety and execution speed by enforcing strict type checking and immutable defaults, while generating native machine code for multiple hardware architectures. The language is built around an integrated toolchain that includes a compiler, package manager, formatter, and testing utilities within a single executable, facilitating rapid development cycles. What distinguishes V is its focus on developer productivity and interoperability. It provides a direct interface for

Gobot is a robotics framework for the Go programming language designed for developing robotics, drones, and IoT applications. It provides a hardware abstraction layer with standardized drivers to interact with GPIO, I2C, SPI, and PWM interfaces across various single-board computers and microcontrollers. The framework functions as an IoT device orchestrator and BLE device manager, enabling the coordination of multiple sensors, actuators, and Bluetooth Low Energy peripherals. It includes specialized interfaces for drone control, allowing for the management of flight maneuvers and video streams

OpenTabletDriver is a user-mode graphics tablet driver and USB HID input manager that translates raw USB input from digitizer hardware into system cursor and pen events. It serves as a hardware abstraction layer that normalizes input from various tablet brands into a consistent API, providing a cross-platform pen interface with pressure and tilt sensitivity. The project distinguishes itself through a plugin-based architecture and a profile-based configuration system, allowing for custom filters, interpolators, and persistent hardware setups. It includes specialized tools for hardware driver d

NuttX is a POSIX-compliant real-time operating system designed for microcontrollers ranging from 8-bit to 64-bit architectures. It provides a deterministic execution environment with a real-time task scheduler and a POSIX embedded kernel to ensure portable code execution across diverse hardware targets. The project distinguishes itself through a comprehensive hardware abstraction layer that provides standardized drivers for I2C, SPI, CAN, and USB across various semiconductor chipsets. It also features an embedded networking stack supporting TCP, UDP, IPv4, and IPv6, alongside industrial proto

IREE is an MLIR-based compiler toolchain and runtime designed to translate machine learning models from various frameworks into optimized binaries for execution across diverse hardware targets. It provides a unified pipeline to ingest models from PyTorch, TensorFlow, JAX, and ONNX, lowering them into a common intermediate representation for deployment on CPUs, GPUs, and bare-metal embedded systems. The project distinguishes itself through a bytecode virtual machine and a hardware abstraction layer that decouple high-level model logic from specific hardware instruction sets. It supports sophis

This project is an educational framework and toolkit designed for developing and testing operating system kernels. It provides a structured environment for implementing fundamental system primitives, including virtual memory management, preemptive process scheduling, and filesystem organization, using Rust and C. The framework is specifically oriented toward RISC-V and x86 architectures, serving as a laboratory for learning how to build core system software from the ground up. The project distinguishes itself by supporting both bare-metal deployment and hardware emulation, allowing developers

This project is a comprehensive technical interview preparation resource and computer science interview guide. It serves as an educational reference for developers to study core software engineering fundamentals and common coding patterns required for employment screenings. The repository provides detailed guides and references covering data structures and algorithms, networking and security, operating systems, and web development. It specifically focuses on the implementation and complexity analysis of sorting, searching, and graph algorithms. The material encompasses a wide breadth of comp

This project is a technical reference and educational guide focused on the internal architecture of the Linux kernel. It serves as a low-level systems programming resource and documentation for operating system internals, detailing the implementation of core mechanisms within the kernel source code. The materials provide a detailed study of the Linux kernel, tracing behavior through actual C source and assembly. It specifically covers the progression from the bootloader and decompression to the final kernel entry point, alongside the management of hardware interrupts and symmetric multiproces

Pumpkin-book is an open-source educational textbook that provides annotated study materials and mathematical derivations for foundational machine learning concepts. It functions as a technical documentation archive, breaking down dense academic literature into accessible, plain-language notes designed to support self-paced learning. The project distinguishes itself through a collaborative knowledge curation model, where the curriculum is managed via a version-controlled system. This workflow relies on community-driven updates and peer review to refine explanations and ensure the accuracy of t

liquidctl is a command line interface and set of Python drivers used to monitor and control liquid cooling hardware. It functions as a liquid cooler controller, hardware telemetry tool, and RGB lighting controller, providing a unified way to manage temperatures, fan speeds, and pump rates for all-in-one and custom loop cooling systems. The project provides a Python hardware driver that enables programmatic control and telemetry collection without relying solely on the command line. It allows for the configuration of device lighting using standard RGB, HSV, and HSL formats. The system include

This project is a monolithic operating system kernel designed to serve as the foundational software layer for diverse computing architectures and embedded platforms. It manages core system services, including processor scheduling, memory allocation, and hardware resource distribution, to facilitate communication between user applications and physical hardware. The kernel utilizes a hardware abstraction layer and platform-specific device trees to ensure consistent operation across a wide variety of processors and specialized computing devices. It supports dynamic functionality through loadable

This project is a tutorial for developing a custom bare metal operating system specifically for the Raspberry Pi 4. It provides the guidance and resources necessary to write software that interacts directly with hardware without the use of a pre-existing kernel. The project centers on an ARM64 cross-compilation toolchain and a build pipeline that transforms source code into raw binary images. It utilizes linker scripts to define physical memory addresses and section placements, ensuring the resulting binary loads at the correct hardware entry point. The codebase covers direct hardware interf

The Espressif SoC Development Framework is a comprehensive toolset for developing, compiling, and flashing applications targeting Espressif system-on-chips. It serves as an embedded toolchain orchestrator and a hardware abstraction layer that simplifies the control of low-level peripherals, memory mapping, and chip-specific registers. The framework provides a dedicated IoT connectivity stack for implementing Wi-Fi, Bluetooth, Zigbee, and Ethernet communication on microcontrollers. It also includes an embedded real-time operating system integration layer to manage multitasking and scheduling o