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

This project is a curated collection of technical cheat sheets and quick-reference guides designed to assist with daily software development tasks. It functions as a static knowledge base, providing concise summaries of programming language syntax, database query commands, and common software tool patterns. The repository organizes these technical notes as version-controlled markdown files, allowing for rapid access to essential information without the need for extensive documentation searches. By maintaining these references in a centralized, repository-driven format, the project helps reduc

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

The data engineering wiki is a crowdsourced knowledge base and reference guide assembled through collaborative contributions from practitioners. It functions as a structured repository of learning paths, architectural decision guides, and software evaluations for data systems, compiled from plain-text source markup files into a searchable static documentation site. The content is organized into strict conceptual hierarchies covering core engineering concepts, security and governance, and infrastructure tools. Contributors and readers can explore foundational architectural patterns, storage s

This project is a protest coordination toolkit and activism resource repository designed to distribute curated documents and legal guides. It serves as a hub for coordinating political protests and civil disobedience by providing a public website that hosts informational materials. The toolkit functions as a forkable codebase, allowing users to rapidly replicate the site structure to deploy their own protest sites. It uses a static site model to transform markdown documentation into publicly accessible pages for sharing across social media. The platform covers activist information distributi

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

CS-Notes is an AI-powered note organizer and computer science knowledge base. It serves as a technical learning curriculum and a structured collection of study materials covering fundamentals such as algorithms, operating systems, and machine learning. The project utilizes large language models to automatically categorize and arrange technical documentation through AI-driven workflows. It organizes these topics into a hierarchical knowledge graph of linked nodes to support self-directed study. Content is stored as markdown flat files for version control and text editing. These files are conv

tech-weekly is a cloud-native knowledge base and technical content aggregator. It serves as a curated directory of architectural deep dives, backend system videos, and professional development live streams organized by technical topic. The project functions as a searchable index of software engineering recordings and documentation. It uses a curated-list content model to aggregate fragmented technical video links into a structured collection for knowledge management. The system is built as a static site that utilizes a flat-file knowledge base. Technical notes and resource links are stored i

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

Pymdown-extensions is a collection of functional enhancements designed to extend the capabilities of standard Markdown processors. It functions as a Python-based library that integrates into the document conversion pipeline to support complex layouts, rich formatting, and specialized content structures. The library distinguishes itself through a modular extension pipeline that allows for advanced syntax transformation and configurable attribute processing. By hooking into the parsing lifecycle, it enables the creation of structured containers, the embedding of binary assets, and the dynamic i

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 repository serves as a curated knowledge base and study resource for professionals preparing for technical interviews in infrastructure and operations. It provides a comprehensive collection of questions and answers covering core engineering concepts, including cloud platforms, infrastructure automation, and industry-standard practices. The project functions as a collaborative documentation repository, utilizing version-controlled text files to maintain technical accuracy. By leveraging community-driven peer review and feedback loops, the content remains structured and verifiable. The re

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