Open-source alternatives to Cheat Sheets

Foam is a personal knowledge management system that organizes information into a navigable web of interconnected markdown files. It functions as a knowledge graph tool, utilizing wiki-style bidirectional linking and metadata to track relationships between documents and concepts. By storing data in standard text files, the system ensures long-term portability and compatibility with external tools. The platform distinguishes itself through its integrated visualization and automation capabilities. It generates graphical maps of file connections to help users identify patterns and discover relati

Vimwiki is a personal wiki plugin and text editor extension for Vim that organizes interconnected text files. It functions as a Markdown knowledge base and a Zettelkasten note system, allowing for the creation of a networked system of notes and documentation. The project provides tools for wiki administration, enabling users to create, rename, and navigate between linked documents via internal linking. It supports various markup formats, including Markdown and MediaWiki, and can transform this content into HTML for web publishing. The system covers personal knowledge management through globa

This project is a documentation theme for the VuePress static site generator, serving as a knowledge base framework and a markdown blog theme. It enables the creation of structured knowledge bases and personal blogs by transforming markdown files into a professional, searchable website. The theme is distinguished by its hierarchical organization system, which arranges content in a book-like format to manage large volumes of information. It includes a multi-dimensional indexing system designed to locate specific information quickly within a large repository. The framework supports digital gar

Boostnote is a local-first note management system and markdown text editor designed for personal knowledge management. It functions as a desktop application that reads and writes markdown files directly to the local disk, allowing for the creation of a searchable personal knowledge base and digital garden. The application provides a writing interface that renders markdown syntax in real time. It is used to organize fragmented information, maintain project documentation, and author structured technical guides.

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Mindmap is a cybersecurity knowledge base and reference library that organizes security tools, frameworks, and methodologies into a visual knowledge map. It functions as a curated directory of cheat sheets and command guides for offensive and defensive security operations, presented as a hierarchical interface with collapsible nodes. The project converts structured markdown files into navigable visual trees to facilitate the study of penetration testing workflows and DevOps learning roadmaps. It also serves as a security compliance framework, providing structured mappings of NIST and ISO 2700

This project is a community-curated directory of open-source software designed for deployment in private server environments and home labs. It serves as a comprehensive resource for discovering independent, self-hosted alternatives to mainstream cloud services, enabling users to maintain full data ownership and control over their digital infrastructure. The directory is structured through a hierarchical taxonomy that organizes a vast collection of applications into logical categories, ranging from media management and data analytics to private communication and team productivity tools. It dis

Trilium is a hierarchical personal knowledge base and digital garden tool designed to organize information into a tree of linked nodes. It functions as a JavaScript programmable wiki and a self-hosted note server, allowing users to maintain a private database of documents synchronized across multiple devices. The platform distinguishes itself through an embedded scripting engine for automating tasks and a REST API that exposes internal data and actions to external tools. Users can further extend the system by modifying the user interface layout and styling through a custom theme engine. The

Heynote is a markdown scratchpad editor and plain text note organizer that utilizes persistent, block-based buffers to maintain state across application sessions. It serves as a code snippet manager with automatic syntax highlighting and a tool for managing multiple categorized text buffers through a tabbed interface. The application functions as an interactive calculation notepad, evaluating mathematical expressions and currency conversions directly within the text. It also includes an image annotation utility that allows for freehand drawings and markups on embedded images, which can then b

English-note is a structured English grammar course and learning resource designed to teach sentence structure and parts of speech. It serves as a language learning guide for students to understand the fundamental rules of the English language. The project is implemented as a markdown-based educational site that utilizes static site generation to convert pre-defined text files into optimized HTML pages. It features a responsive layout that adjusts to different screen sizes and devices. The resource supports self-paced language study and English language acquisition through a collection of le

This project is a relational database cheat sheet and SQL reference guide. It provides a collection of syntax examples and query documentation for managing relational databases using structured query language. The tool is implemented as a static site with client-side searchable documentation, allowing for immediate filtering of technical content through a browser-based index. The reference covers relational database management, including data retrieval, database schema management, and record maintenance. It also includes guidance on relational data manipulation through table joins and the g

This project is a curated knowledge base and development guide focused on best practices for the Laravel framework. It provides a collection of architectural patterns and coding standards designed to help developers build scalable PHP server-side applications. The resource specifically covers application architecture, database modeling, and general coding best practices to improve the quality and readability of Laravel codebases. The content is delivered as a static site, rendering technical documentation and guides from markdown files into a searchable web interface.

This project is a technical text renderer designed to display complex mathematical notation and syntax-highlighted code within digital document formats. It functions as a MathML technical renderer and a system for producing static site generated documentation. The project creates digital textbooks available as both HTML5 digital books and standardized EPUB3 eBooks. It transforms source materials into pre-rendered HTML and EPUB files, ensuring the content is compatible with modern web browsers and electronic book readers. The rendering surface utilizes a responsive layout with viewport adapta

This project is a Chinese translation of a comprehensive self-study guide for learning core computer science concepts and theoretical foundations. It serves as a community-driven effort to provide a professional academic path for computer science outside of a formal university program. The project is organized as an open-source translation effort using a pull-request workflow to manage community contributions and peer reviews. Educational materials are maintained as a structured collection of Markdown files and delivered as static site documentation for web access.

This project is a machine learning knowledge map and educational resource that provides a structured learning path for data science. It organizes core concepts, from basic data analysis to deep learning, into a visual guide and markdown-based knowledge graph. The resource connects theoretical foundations and mathematical concepts to practical execution through links to runnable notebooks and implementation examples. This allows for a transition from conceptual study to hands-on practice. The project uses hierarchical node organization and modular topic decomposition to visualize relationship

This project is a comprehensive Go language learning course and programming fundamentals guide. It provides a structured curriculum of video and text lessons designed to teach both basic and advanced concepts of the Go programming language. The educational material is organized through a hierarchical system of summarized notes. These notes use timestamp-linked mapping to connect textual summaries directly to specific moments in video tutorials for precise knowledge retrieval. The content is authored in markdown and delivered as a static site, with the curriculum structure mirroring a nested

This project is a computer science exam study resource and academic knowledge base. It serves as an exam preparation toolkit providing curated textbooks, past exam papers, and study guides specifically for graduate entrance exams. The repository functions as an algorithm and data structures reference library, containing source code and implementation guides for core computer science fundamentals. It organizes conceptual notes, presentation slides, and mind maps for subjects including operating systems and computer organization. The project is implemented as a markdown-based knowledge base an

This project is a bug bounty resource directory, vulnerability research cheatsheet, and web security payload library. It serves as a centralized collection of curated payloads and common attack vectors used to identify security vulnerabilities in web applications. The repository provides a directory of platforms, books, and tools to support vulnerability discovery skills. It includes a reference for tested payloads and techniques used to trigger bugs and identify vulnerabilities during security audits. The content covers web application pentesting, security vulnerability testing, and general

This project is a game development knowledge base and technical reference focused on real-time rendering, computer graphics, and GPU programming. It serves as a study guide for game programming, providing a curated collection of notes and documentation on graphics theory. The repository covers educational resources for game engine development, specifically addressing software engineering practices and design patterns. It includes structured references for programming languages and tools used in professional game development to improve performance and image quality. The content is stored as m

This project is a comprehensive reference guide and cheat sheet for the Go programming language. It serves as a syntax reference and documentation collection designed for quick lookup of fundamental operators, core language features, and specific code patterns. The resource covers a wide range of technical domains, including Go concurrency primitives, software architecture patterns such as interface embedding, and standard error handling. It provides guides on implementing goroutines and channels to manage parallel execution and asynchronous tasks. The content is delivered as a static site g

backend-cheats is a comprehensive backend engineering reference guide and a collection of technical cheatsheets. It serves as a knowledge base for server-side development, networking, and computer science fundamentals, delivered as a markdown-based static site. The project provides detailed handbooks for API design, specifically covering REST and GraphQL interfaces, and software architecture patterns such as Monolithic, Microservices, and MVC. It includes a database architecture overview comparing relational and NoSQL paradigms, as well as a web security reference for identifying vulnerabilit

This project is a curated Git command reference and version control cheat sheet. It serves as a workflow guide for initializing projects, managing branches, and coordinating changes between local and remote environments. The documentation provides a categorized list of commands to manage file snapshots, commit histories, and general development workflows. It maps common version control tasks to their specific shell syntax for quick reference. The reference covers several primary capability areas, including branch management, history inspection, and remote synchronization. It also includes gu

Blinko is a personal knowledge management system and an LLM-powered knowledge base that enables users to capture and organize thoughts through a bi-directional knowledge graph. It functions as a RAG-enabled note-taking application and a self-hosted Markdown editor, allowing for the creation of permanent documentation and fleeting notes. The project distinguishes itself by integrating retrieval-augmented generation to provide conversational querying and AI-powered analysis of private document libraries. It supports both cloud-based and local AI model integration, enabling users to perform sema

Notable is a local-first markdown note taking application and document manager. It functions as a personal knowledge base that persists notes as plain text files on the local disk to ensure data portability and user ownership. The application provides a markdown editor featuring a split-pane live preview for real-time rendering of content, including mathematical expressions and diagrams. Information is organized through a hierarchical tagging system that allows for nested labels and multi-dimensional categorization. The software includes tools for bulk note management to apply operations acr

Dendron is a markdown knowledge management system designed for organizing linked files into a hierarchical personal knowledge base. It functions as a git-backed note manager that stores data as plaintext markdown files to ensure data persistence and ownership. The system distinguishes itself through schema-based organization, which applies structural templates and autocomplete hints to maintain consistency across large sets of documents. It also provides bi-directional linking and an interactive graph view to visualize relationships between notes, alongside a static site generator that export

Cheat is a command-line cheatsheet manager and terminal reference tool used for creating and viewing searchable, interactive guides. It functions as a plain-text knowledge base that organizes technical notes and command snippets through a hierarchical directory structure and metadata tags. The tool provides context-aware note management by discovering and displaying project-specific documentation based on the current working directory. It allows for the creation of a personalized collection of reference files that can be retrieved directly within a shell environment to assist with command opt

nb is a command-line note manager and personal knowledge management system that organizes plain-text documents and web bookmarks. It functions as a Markdown knowledge base, allowing users to create a structured collection of information through a shell-scripted interface. The system uses Git for versioning and synchronization, tracking full revision history and enabling the sync of notebooks across multiple devices via remote repositories. It provides security for sensitive data through AES-256 or GPG encryption and supports document conversion into various publishing formats using the Pandoc