Open-source alternatives to Computerraria

Bitwise is a computer architecture education kit and a comprehensive set of guides for building a custom CPU, operating system, and compiler from scratch. It serves as a CPU design tutorial and a practical framework for implementing a unique instruction set architecture. The project provides a custom instruction set architecture toolchain, including resources for creating a matching assembler and compiler. It further includes a hardware development guide for synthesizing computer components and peripheral controllers for deployment on programmable logic devices and FPGAs. The kit covers full

excelCPU is a spreadsheet-based computer emulator that simulates a 16-bit central processing unit. It functions as an educational CPU model where the system state, registers, and random access memory are managed within a grid of spreadsheet cells. The project includes an assembly compiler that converts custom assembly source code into a format compatible with spreadsheet cells for read-only memory storage. It allows for both automatic program execution and manual operation to override specific instructions. The simulation covers core hardware architecture concepts, including logic gate proto

The Powder Toy is a physics sandbox simulator and programmable logic simulator. It provides a real-time environment for modeling the interactions of solids, liquids, and gases using a particle physics engine that calculates movement, heat transfer, and pressure on a 2D grid. The system is a scriptable simulation environment that supports custom plugins and scripting to automate workflows. It allows for the construction of functional electronic circuits and complex machines using integrated materials and conductive elements. The software covers environmental dynamics modeling and material int

Logisim Evolution is a digital logic simulator and schematic editor used for designing and verifying digital circuits. It functions as a tool for digital circuit design and real-time logic simulation, allowing users to create schematic representations of electronic hardware using gates and registers. The software distinguishes itself by providing hardware description language tools that allow for the definition of custom component behavior and the translation of visual schematics into synthesis-ready code for FPGA hardware deployment. It also serves as a bridge for physical hardware integrati

This project consists of technical instructional guides and a structured computer science curriculum designed to teach the construction of a full computing stack from transistors up to a web browser. It provides a 12-week educational course that covers the fundamental domains of computer architecture and digital logic design. The curriculum is distinguished by its first-principles approach, guiding the learner through the engineering of CPUs, FPGAs, and PCBs using digital logic and hardware description languages. It includes specific syllabi for building a hardware design, a TCP/IP network st

CS-Xmind-Note is a collection of structured mind maps and conceptual diagrams serving as a comprehensive knowledge base for computer science fundamentals. It functions as an academic reference and study guide, organizing core subjects into a visual mapping of interdependent technical concepts. The project utilizes an XMind-compatible schema to model complex domains through hierarchical nodes and relational concept mapping. This approach allows for the visual representation of technical layers, linking hardware specifications to software abstractions. The knowledge base covers several primary

This project is a multilingual educational framework that provides curated roadmaps and translated resources for mastering core computer science subjects. It serves as a Chinese translation of a structured guide designed to help students and engineers learn computer science fundamentals through a sequence of recommended books and courses. The framework focuses on technical content localization, converting English computer science roadmaps into Chinese to improve accessibility. It utilizes a manual translation workflow to ensure conceptual accuracy across its study guides and resource collecti

Anbox is an Android container environment and runtime designed to execute Android applications on Linux desktops. It utilizes a container-based system to run the Android operating system without the overhead associated with traditional hardware virtualization. The system features a hardware abstraction layer that routes hardware access and sensor data through a host daemon to provide accelerated rendering. It integrates with the Linux desktop by mapping individual Android application layers to separate windows, allowing apps to function as distinct desktop applications. The project supports

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

This project is a cross-compiler toolchain for RISC-V software development. It provides the necessary components to compile C and C++ source code into executable binaries and libraries specifically for the RISC-V hardware architecture. The toolchain supports multi-architecture binary generation and multilib capabilities, allowing a single installation to target various instruction set specifications and bit-widths. It integrates with alternative compilers such as LLVM and Clang and includes a bootstrapped build pipeline to produce high-performance versions of the tools. The system covers bro

Util-linux is a collection of essential command-line tools and system administration binaries designed for managing core Linux operating system functions and hardware. It provides a suite of low-level programs that interact directly with the Linux kernel to configure system resources and perform standard administrative tasks on Unix-like operating systems. The project is built upon a modular architecture where independent, loosely coupled binaries share common libraries to minimize resource usage. It adheres to standard system programming interfaces to ensure portability and stability across

This project provides a suite of diagnostic and validation utilities for container runtimes that implement the Kubernetes Container Runtime Interface. It serves as a command-line interface for interacting with and managing container lifecycles, images, and sandboxes directly on a host machine without requiring a full cluster deployment. The toolset distinguishes itself through its focus on interface compliance and performance verification. It includes automated test suites that validate whether a runtime adheres to defined interface specifications and handles resource plugin integration corre

Tensor-Puzzles is an educational exercise suite and numerical computing tutorial designed for mastering tensor operations and broadcasting rules within PyTorch. It functions as an implementation trainer where users practice transitioning mathematical formulas into code by reimplementing deep learning mathematical primitives. The project utilizes a constraint-based exercise suite that restricts available library calls to force the use of specific tensor primitives. These challenges are structured as sequential puzzles that require users to solve tasks using a modular implementation pattern, wh

This project is a container-based workspace orchestrator and a standard for defining development environments using Docker. It provides a mechanism to automate the build, launch, and management of isolated toolchains, ensuring that software dependencies and runtimes are separated from the local host system. The system enables the distribution of environment definitions, editor settings, and toolchain configurations via source control. This ensures portability and standardization across teams, allowing contributors to instantiate identical workspaces on different machines. It also supports rem

Gophernotes is a backend implementation of the Jupyter kernel protocol and an interactive runtime that enables the execution of Go language code within notebook environments. It serves as a Go language execution engine, allowing users to integrate Go into polyglot notebooks such as Jupyter and nteract. The project supports the creation of documents that combine executable source code with rich media. It maps internal data types to various formats, including HTML, JSON, LaTeX, PDF, and images, to provide visual representations of execution results. The system covers a range of capabilities in

This project is a game decompilation project consisting of a reconstructed C source codebase and the systems used for binary reconstruction. It provides a human-readable version of a commercial game title created through static and dynamic analysis to facilitate technical study and modification. The project utilizes a containerized build environment to ensure reproducible compilation and consistent toolchain versions across different host operating systems. It includes a game binary reconstructor that translates original machine code into source code and a system for compiling the codebase in

ruby-build is a Ruby version installer and build tool for Unix-like systems. It manages the process of downloading, compiling, and installing multiple versions of the Ruby language from source. The utility utilizes definition files to map version numbers to download URLs and installation instructions. It supports custom build definitions, allows for the redirection of package downloads to mirror URLs, and applies checksum-based integrity verification to downloaded source archives. The tool provides capabilities for custom Ruby compilation, including the application of source patches and the

zml is a machine learning model compiler and cross-platform inference engine that transforms model descriptions into optimized executable binaries for specific hardware accelerators. It functions as a model deployment toolkit and hardware-agnostic orchestrator, utilizing a tensor-based architecture definition to provide strong type checking during the compilation process. The project distinguishes itself through the ability to shard tensors and distribute large-scale AI workloads across a logical mesh of multiple devices. It further supports the remote model lifecycle by authenticating and do

Mago is a PHP static analysis tool, linter, and code formatter. It detects type errors, dead code, and logic bugs through advanced type inference and flow analysis, while providing a deterministic engine to rewrite source files according to style guides. The project distinguishes itself with a WebAssembly runtime that enables PHP analysis to execute entirely within a web browser, allowing results to be shared via URL. It also provides a minimal Dockerized toolchain distributed as a scratch image for consistent execution across different processor architectures. The toolset covers architectur

This project provides a library of standardized configuration templates and infrastructure-as-code tooling designed to create reproducible, containerized development environments. By utilizing the Dev Container specification, it enables teams to define isolated workspaces that ensure consistent tooling, runtimes, and editor settings across different machines and team members. The project distinguishes itself by offering a framework for authoring and distributing reusable environment definitions as container images. This approach leverages existing registry infrastructure for versioning and di

The Operator SDK is a framework for building, packaging, and managing custom controllers that extend the Kubernetes API. It serves as a toolset for defining new API types and implementing reconcile loops to automate the lifecycles of complex applications. The project provides specialized support for creating operators based on Helm charts or Ansible playbooks, allowing users to maintain a desired cluster state using existing automation tools. It includes a dedicated system for packaging controllers into standardized container image bundles for distribution via the Operator Lifecycle Manager.

This project is a hardware core and board support package that integrates STM32 microcontrollers into the Arduino development environment. It functions as an embedded systems development tool, bridging high-level programming workflows with ARM Cortex-M microcontroller architectures. The core provides the necessary configuration files and libraries to enable the compilation and deployment of firmware directly onto STM32 hardware. By mapping standard programming functions to specific microcontroller register operations, it ensures consistent behavior across different hardware platforms while ut

This project is a JavaScript style guide and a set of coding standards designed to ensure codebase consistency. It provides a collection of best practices for writing maintainable and idiomatic code, focusing on variable naming, type checking, and execution context. The project serves as a static analysis guide, offering frameworks and guidelines for using linters and automated tools to identify bugs and verify code correctness before deployment. It establishes standards for formatting, syntax, and variable declarations to standardize code style across a project. The scope of the project cov

GoJS is a JavaScript diagramming library and canvas-based visualization engine used to build interactive flowcharts, organizational charts, and network diagrams. It functions as a data-driven framework that binds JavaScript data models to visual elements, enabling bidirectional synchronization between the underlying data and the graphical representation. The library features a comprehensive graph layout engine capable of automatically arranging nodes into trees, grids, circles, or force-directed layouts. It distinguishes itself through a template-based system for generating visual parts and a

picorv32 is a size-optimized RISC-V CPU core and synthesizable processor IP designed for integration into FPGA and ASIC hardware designs. It serves as an open-source CPU architecture and embedded system-on-chip component that implements a standard RISC-V instruction set. The design features a modular architecture that allows for the integration of external coprocessors to implement custom non-branching instructions. It includes a parameterized integer unit with configurable multiplication and division cores to balance performance against total logic gate count. The project covers a broad ran

This project is an educational resource and reference library designed to teach fundamental data structures and algorithmic problem-solving. It provides a structured pedagogical framework that organizes complex technical concepts into a logical progression, helping learners understand how data is organized, stored, and processed to solve computational problems efficiently. The repository distinguishes itself through a multi-language codebase that maintains parallel, consistent implementations of core algorithms and data structures across various programming languages. It bridges the gap betwe

ejabberd is a multi-protocol communication gateway and scalable server that implements XMPP for instant messaging and presence. It serves as a federated messaging platform, enabling interoperable communication and user discovery between different remote servers. The project functions as an MQTT message broker for lightweight IoT device communication and a SIP signaling server for managing voice and multimedia signaling traffic. It allows for the hosting of multiple domains on a single instance using virtual hosting to isolate configurations and prevent username conflicts. The system provides