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Knowledge Repositories (mostly on GitHub)

Linux

• awesome-selfhosted/awesome-selfhosted - A list of Free Software network services and web applications which can be hosted locally. Selfhosting is the process of hosting and managing applications instead of renting from Software-as-a-Service providers.

• luong-komorebi/Awesome-Linux-Software - A list of awesome applications, software, tools and other materials for Linux distros.

• k4m4/terminals-are-sexy - A curated list of Terminal frameworks, plugins & resources for CLI lovers.

• jlevy/the-art-of-command-line - Master the command line, in one page.

• dylanaraps/pure-bash-bible - A collection of pure bash alternatives to external processes.

• learnbyexample/Command-line-text-processing - From finding text to search and replace, from sorting to beautifying text and more.

• imthenachoman/How-To-Secure-A-Linux-Server - An evolving how-to guide for securing a Linux server.

• agarrharr/awesome-cli-apps - A curated list of command line apps.

• mayfrost/guides - Looking for a guide? You came to the right place.

• chubin/awesome-console-services - A curated list of awesome console services (reachable via HTTP, HTTPS and other network protocols).

• alebcay/awesome-shell - A curated list of awesome command-line frameworks, toolkits, guides and gizmos.

• Websites/

  • cindyq/linuxjourney - Learn the ways of Linux-fu, for free. https://linuxjourney.com.
  • junaid33/opensource.builders - Find open-source alternatives. https://opensource.builders.
  • lhunath/guide.bash.academy - Bash Academy - The Bash Guide. https://guide.bash.academy.

• Vim

  • hakluke/how-to-exit-vim - Some simple methods for exiting vim.

  • Websites/

    • vim-awesome/vim-awesome - Awesome Vim plugins from across the universe. http://vimawesome.com.
    • rtorr/vim-cheat-sheet - A mobile friendly Vim cheat sheet. https://vim.rtorr.com.
    • theicfire/vimsheet - Vim cheat sheet from beginners to pros. https://vimsheet.com.
    • vim-advent-calendar/vimways.org - Vim-themed advent calendar. https://vimways.org.
    • igrigorik/vimgolf - Real Vim ninjas count every keystroke - do you? http://www.vimgolf.com.

• Emacs

  • emacs-tw/awesome-emacs - A community driven list of useful Emacs packages, libraries and others.
  • redguardtoo/mastering-emacs-in-one-year-guide - Be great at emacs in one year.

• Shells

  • unixorn/awesome-zsh-plugins - A collection of ZSH frameworks, plugins, themes and tutorials.

• LaTeX

  • luong-komorebi/Begin-Latex-in-minutes - Brief Intro to LaTeX for beginners that helps you use LaTeX with ease.

• Browser Customization

  • Aris-t2/CustomCSSforFx - Custom CSS tweaks for Firefox Quantum.
  • Timvde/UserChrome-Tweaks - A community maintained repository of userChrome.css tweaks for Firefox.
  • MrOtherGuy/firefox-csshacks - Collection of userstyles affecting the browser.

• Dotfiles

  • GitHub Search "dotfiles"

  • (Web) Dotfiles - ArchWiki

  • webpro/awesome-dotfiles - A curated list of dotfiles resources.

  • holman/dotfiles - Zach Holman's Dotfiles.

  • mathiasbynens/dotfiles - Mathias Bynen's Dotfiles.

  • jessfraz/dotfiles - Jess Frazelle's Dotfiles.

  • LukeSmithxyz/voidrice - Luke Smith's Dotfiles.

  • wincent/wincent - Greg Hurrell's Dotfiles.

  • (GitLab) dwt1/dotfiles - Distrotube's Dotfiles

  • thoughtbot/dotfiles - A set of vim, zsh, git, and tmux configuration files.

  • Websites/

    • dotfiles/dotfiles.github.com - The unofficial guide to doing dotfiles on GitHub. http://dotfiles.github.io.

Raspberry Pi

• thibmaek/awesome-raspberry-pi - A curated list of awesome Raspberry Pi tools, projects, images and resources.

Regular Expressions and Algorithms

• ziishaned/learn-regex - Learn regex the easy way.

• Websites/

  • ericdrowell/BigOCheatSheet - https://bigocheatsheet.com.
  • geongeorge/i-hate-regex - The code for iHateregex.io - The Regex Cheat Sheet. https://iHateRegex.io.
  • firasdib/Regex101 - Online Regex Tester and Debugger. Issue Tracker for https://regex101.com.
  • (GitLab) javallone/regexper-static - Regular Expression Visualization Site. https://regexper.com.

Programming

• Websites/
  • ronreiter/interactive-tutorials - Interactive Tutorials. https://www.learnpython.org.

Python

• donnemartin/interactive-coding-challenges - 120+ interactive Python coding interview challenges (algorithms and data structures). Includes Anki flashcards.

• vinta/awesome-python - A curated list of awesome Python frameworks, libraries, software and resources.

• TheAlgorithms/Python - All Algorithms implemented in Python.

• faif/python-patterns - A collection of design patterns/idioms in Python.

• keon/algorithms - Minimal examples of data structures and algorithms in Python.

• satwikkansal/wtfpython - A collection of surprising Python snippets and lesser-known features.

• mahmoud/awesome-python-applications - Free software that works great, and also happens to be open-source Python.

• geekcomputers/Python - @geekcomputers' Python Examples.

• crazyguitar/pysheeet - Python Cheat Sheet.

• funkythings/python-cheat-sheet - Python Cheat Sheet NumPy, Matplotlib.

• machinelearningmindset/machine-learning-course - Machine Learning Course with Python. Refer to the course page for step-by-step explanations.

• chrisalbon/notes - Notes On Using Data Science & Artificial Intelligence.

• rougier/numpy-100 - 100 numpy exercises (with solutions).

• rougier/numpy-tutorial - Numpy beginner tutorial.

• rougier/matplotlib-tutorial - Matplotlib tutorial for beginners.

• matplotlib-cheatsheet - Matplotlib 3.1 cheat sheet.

• chrisalbon/code_py - A collection of well-commented code snippets for data science.

• cantaro86/Financial-Models-Numerical-Methods - Collection of notebooks about quantitative finance, with interactive python code.

• Websites/

  • scipy-lectures/scipy-lecture-notes - Tutorial material on the scientific Python ecosystem. https://scipy-lectures.org.
  • pyvideo/pyvideo - A Python media index. https://pyvideo.org.

JavaScript

• airbnb/javascript - JavaScript Style Guide.

• freeCodeCamp/freeCodeCamp - The https://www.freeCodeCamp.org open source codebase and curriculum. Learn to code for free together with millions of people.

• trekhleb/javascript-algorithms - Algorithms and data structures implemented in JavaScript with explanations and links to further readings.

• 30-seconds/30-seconds-of-code - Short JavaScript code snippets for all your development needs.

• hemanth/functional-programming-jargon - Jargon from the functional programming world in simple terms!

• yangshun/awesome-spinners - A curated collection of dazzling web spinners.

• wesbos/JavaScript30 - 30 Day Vanilla JS Challenge.

• ryanmcdermott/clean-code-javascript - Clean Code concepts adapted for JavaScript.

• javascript-tutorial/en.javascript.info - Modern JavaScript Tutorial.

• You Don't Know JS - A book series on JavaScript. @YDKJS on twitter.

• leonardomso/33-js-concepts - 33 concepts every JavaScript developer should know.

• denysdovhan/wtfjs - A list of funny and tricky JavaScript examples.

• mbeaudru/modern-js-cheatsheet - Cheatsheet for the JavaScript knowledge you will frequently encounter in modern projects.

• sorrycc/awesome-javascript - A collection of awesome browser-side JavaScript libraries, resources and shiny things.

• lukehoban/es6features - Overview of ECMAScript 6 features.

• you-dont-need/You-Dont-Need-JavaScript - CSS is powerful, you can do a lot of things without JS.

• you-dont-need/You-Dont-Need-Lodash-Underscore - List of JavaScript methods which you can use natively + ESLint Plugin.

• you-dont-need/You-Dont-Need-Momentjs - List of functions which you can use to replace moment.js + ESLint Plugin.

• vlandham/js_data - Data manipulation and processing in JavaScript.

• bradtraversy/vanillawebprojects - Mini projects built with HTML5, CSS & JavaScript. No frameworks or libraries.

• dexteryy/spellbook-of-modern-webdev/ - A Big Picture, Thesaurus, and Taxonomy of Modern JavaScript Web Development.

• usablica/front-end-frameworks - A collection of best front-end frameworks for faster and easier web development.

• lydiahallie/javascript-questions - A long list of (advanced) JavaScript questions, and their explanations.

• Websites/

  • phuoc-ng/1loc - What's your favorite JavaScript single LOC (line of code)? https://1loc.dev.
  • phuoc-ng/html-dom - Common tasks of managing HTML DOM with vanilla JavaScript. https://htmldom.dev.
  • wesbos/keycodes - Easy visualizer for JavaScript KeyCodes. https://keycode.info.

TypeScript

• DefinitelyTyped/DefinitelyTyped - The repository for high quality TypeScript type definitions.
• typescript-cheatsheets/react-typescript-cheatsheet - Cheatsheets for experienced React developers getting started with TypeScript.

HTML/CSS

• joshbuchea/HEAD - A list of everything that could go in the head of your document.
• philipwalton/flexbugs - A community-curated list of flexbox issues and cross-browser workarounds for them.
• 30-seconds/30-seconds-of-css - "Short CSS code snippets for all your development needs.
• phuoc-ng/csslayout - A collection of popular layouts and patterns made with CSS. Now it has 90+ patterns and continues growing!

Browser Add-ons/Extensions

• mdn/webextensions-examples - Example Firefox add-ons created using the WebExtensions API.

Design

• bradtraversy/design-resources-for-developers - Curated list of design and UI resources from stock photos, web templates, CSS frameworks, UI libraries, tools and much more.

Rust

• phil-opp/blog_os - Writing an OS in Rust.

• EmilHernvall/dnsguide - A guide to writing a DNS Server from scratch in Rust.

• Websites/

  • ralfbiedert/cheats.rs - Rust Language Cheat Sheet. https://cheats.rs.

Haskell

• soupi/haskell-study-plan - An opinionated list of resources for learning Haskell.

Elixir

• elixirschool/elixirschool - Premier destination to learn and master the Elixir programming language.

C

• DoctorWkt/acwj - A Compiler Writing Journey.
• cstack/db_tutorial - Writing a sqlite clone from scratch in C.

C++

• isocpp/CppCoreGuidelines - The C++ Core Guidelines are a set of tried-and-true guidelines, rules, and best practices about coding in C++.

Go

• hoanhan101/ultimate-go - Ultimate Go study guide, with heavily documented code and programs analysis all in 1 place.

Java

• iluwatar/java-design-patterns - Design patterns implemented in Java.
• teivah/algodeck - Algo Deck is an Open-Source Collection of +200 Algorithmic Cards to Help you Preparing your Algorithm & Data Structure Interview.
• williamfiset/Algorithms - A collection of algorithms and data structures.

Swift

• raywenderlich/swift-algorithm-club - Algorithms and data structures in Swift, with explanations!

APIs

• microsoft/api-guidelines - Microsoft REST API Guidelines.
• public-apis/public-apis - A collective list of free APIs for use in software and web development.
• mledoze/countries - World countries in JSON, CSV, XML and Yaml.

Data Science/Scientific Computing

Quantum Computing

• microsoft/QuantumKatas - Tutorials and programming exercises for learning Q# and quantum computing.

AI and Deep Learning/Machine Learning

• openai/spinningup - An educational resource to help anyone learn deep reinforcement learning.
• practicalAI/practicalAI - A practical approach to machine learning to enable everyone to learn, explore and build.
• madewithml/basics - 📚 Learn ML with clean code, simplified math and illustrative visuals. As you learn, work on interesting projects and share them on https://madewithml.com for the community to discover and learn from!
• lexfridman/mit-deep-learning - Tutorials, assignments, and competitions for MIT Deep Learning related courses.
• ageron/handson-ml - A series of Jupyter notebooks that walk you through the fundamentals of Machine Learning and Deep Learning in python using Scikit-Learn and TensorFlow.
• ageron/handson-ml2 - A series of Jupyter notebooks that walk you through the fundamentals of Machine Learning and Deep Learning in python using Scikit-Learn and TensorFlow 2.
• eriklindernoren/ML-From-Scratch - Machine Learning From Scratch. Bare bones NumPy implementations of machine learning models and algorithms with a focus on accessibility. Aims to cover everything from linear regression to deep learning.

System Design

• donnemartin/system-design-primer - Learn how to design large-scale systems. Prep for the system design interview. Includes Anki flashcards.
• justinamiller/SoftwareArchitect - Path to a Software Architect.

Web Design/Accessibilty

• Websites/
  • a11yproject/a11yproject.com - A community–driven effort to make web accessibility easier. https://a11yproject.com.

Source Control/Git

• progit/progit2 - Pro Git 2nd Edition.

• arslanbilal/git-cheat-sheet - git and git flow cheat sheet.

• git-tips/tips - Most commonly used git tips and tricks.

• tiimgreen/github-cheat-sheet - A list of cool features of Git and GitHub.

• github/gitignore - A collection of useful .gitignore templates.

• Websites/

  • firstcontributions/first-contributions - Help beginners to contribute to open source projects. https://firstcontributions.github.io.
  • github/training-kit - Open source cheat sheets for Git and GitHub. https://github.github.com/training-kit.
  • git/git-reference - Online Git Reference. http://git.github.io/git-reference.
  • rogerdudler/git-guide - git - the simple guide. http://rogerdudler.github.com/git-guide.

Open Source

• freeCodeCamp/how-to-contribute-to-open-source - A guide to contributing to open source.

• Websites/

  • github/choosealicense.com - A site to provide non-judgmental guidance on choosing a license for your open source project. https://choosealicense.com.
  • github/opensource.guide - Community guides for open source creators. https://opensource.guide.

Tensorflow

• aymericdamien/TensorFlow-Examples - TensorFlow Tutorial and Examples for Beginners (support TF v1 & v2).
• tensorflow/models - Models and examples built with TensorFlow.

System Administration/Site Reliability/Production Engineering

• kahun/awesome-sysadmin - A curated list of amazingly awesome open source sysadmin resources inspired by Awesome PHP.
• dastergon/awesome-sre - A curated list of Site Reliability and Production Engineering resources. https://sre.xyz.

Cheatsheets

• LeCoupa/awesome-cheatsheets - Awesome cheatsheets for popular programming languages, frameworks and development tools. They include everything you should know in one single file.
• Kapeli/cheatsheets - Collection of Dash cheat sheets https://kapeli.com/cheatsheets.
• Kapeli/Dash-User-Contributions - Dash repo of user contributed docsets.
• rstacruz/cheatsheets - @rstacruz's cheatsheets. https://devhints.io.

Privacy and Security

• OWASP/CheatSheetSeries - The OWASP Cheat Sheet Series was created to provide a concise collection of high value information on specific application security topics.

• Websites/

  • privacytoolsIO/privacytools.io - You are being watched. Protect your privacy against global mass surveillance. https://privacytools.io.

Penetration Testing

• Hack-with-Github/Awesome-Hacking - A collection of various awesome lists for hackers, pentesters and security researchers.
• danielmiessler/SecLists - SecLists is the security tester's companion. It's a collection of multiple types of lists used during security assessments, collected in one place. List types include usernames, passwords, URLs, sensitive data patterns, fuzzing payloads, web shells, and many more.
• OlivierLaflamme/Cheatsheet-God - Penetration Testing Reference Bank - OSCP / PTP & PTX Cheatsheet.
• juliocesarfort/public-pentesting-reports - Curated list of public penetration test reports released by several consulting firms and academic security groups.
• SundownDEV/hacker-roadmap - A guide for amateurs pen testers and a collection of hacking tools, resources and references to practice ethical hacking, pen testing and web security.
• nahamsec/Resources-for-Beginner-Bug-Bounty-Hunters - A list of resources for those interested in getting started in bug bounties.

Safer Internet

• StevenBlack/hosts - Extending and consolidating hosts files from several well-curated sources like adaway.org, mvps.org, malwaredomainlist.com, someonewhocares.org, and potentially others. You can optionally invoke extensions to block additional sites by category.
• EnergizedProtection/block - Let's make an annoyance free, better open internet, altogether!

Decentralization

• redecentralize/alternative-internet - A collection of interesting new networks and tech aiming at decentralisation (in some form).

Video Production

• leandromoreira/digital_video_introduction - A hands-on introduction to video technology: image, video, codec (av1, vp9, h265) and more (ffmpeg encoding).

Natural Language Processing

• microsoft/nlp-recipes - Natural Language Processing Best Practices & Examples.

Interviewing/Jobs

• h5bp/Front-end-Developer-Interview-Questions - A list of helpful front-end related questions you can use to interview potential candidates, test yourself or completely ignore.
• yangshun/front-end-interview-handbook - Almost complete answers to "Front-end Job Interview Questions" which you can use to interview potential candidates, test yourself or completely ignore.
• jwasham/coding-interview-university - A complete computer science study plan to become a software engineer.
• viraptor/reverse-interview - Questions to ask the company during your interview.
• kdn251/interviews - Everything you need to know to get the job.
• remoteintech/remote-jobs - A list of semi to fully remote-friendly companies in tech.
• lukasz-madon/awesome-remote-job - A curated list of awesome remote jobs and resources.

macOS/iOS

• serhii-londar/open-source-mac-os-apps - 🚀 Awesome list of open source applications for macOS.
• dkhamsing/open-source-ios-apps - Collaborative List of Open-Source iOS Apps.
• nikitavoloboev/my-mac-os - List of applications and tools that make my macOS experience even more amazing.
• learn-anything/alfred-workflows - Amazing Alfred Workflows.
• zenorocha/alfred-workflows - A collection of Alfred 3 and 4 workflows that will rock your world.

Project Based Learning

• danistefanovic/build-your-own-x - Build your own (insert technology here).
• karan/Projects - A list of practical projects that anyone can solve in any programming language.
• tuvtran/project-based-learning - Curated list of project-based tutorials.
• florinpop17/app-ideas - A Collection of application ideas which can be used to improve your coding skills.
• AlgoryL/Projects-from-Scratch - Read and do projects.

Computer Science

• ossu/computer-science - Path to a free self-taught education in Computer Science!
• ForrestKnight/open-source-cs - Open Source CS Curriculum.
• P1xt/p1xt-guides - Programming curricula.

Courses/Books

• EbookFoundation/free-programming-books - Freely available programming books.

• zero-equals-false/awesome-programming-books - A curated list of awesome programming books.

• mikesprague/udacity-nanodegrees - List of Udacity Nanodegree programs with links to the free courses in their curricula.

• papers-we-love/papers-we-love - Papers from the computer science community to read and discuss. https://paperswelove.org.

• fastai/fastbook - Draft of the fastai book.

General

• GitHub Search 'awesome'

• GitHub Explore

• sindresorhus/awesome - 😎 Awesome lists about all kinds of interesting topics.

• minimaxir/hacker-news-undocumented - Some of the hidden norms about Hacker News not otherwise covered in the Guidelines and the FAQ.

• jnv/lists - The definitive list of lists (of lists) curated on GitHub and elsewhere.

• minimaxir/big-list-of-naughty-strings - The Big List of Naughty Strings is a list of strings which have a high probability of causing issues when used as user-input data.

• bmorelli25/Become-A-Full-Stack-Web-Developer - Free resources for learning Full Stack Web Development.

• hellerve/programming-talks - Awesome & interesting talks about programming.

• Developer-Y/cs-video-courses - List of Computer Science courses with video lectures.

• chrislgarry/Apollo-11 - Original Apollo 11 Guidance Computer (AGC) source code for the command and lunar modules.

• LisaDziuba/Awesome-Design-Tools - The best design tools and plugins for everything.

• LisaDziuba/Marketing-for-Engineers - A curated collection of marketing articles & tools to grow your product.

• dastergon/awesome-chaos-engineering - A curated list of Chaos Engineering resources.

• mtdvio/every-programmer-should-know - A collection of (mostly) technical things every software developer should know.

• sdmg15/Best-websites-a-programmer-should-visit - Some useful websites for programmers.

• rShetty/awesome-podcasts - Collection of awesome podcasts.

• gothinkster/realworld - "The mother of all demo apps" — Exemplary fullstack Medium.com clone powered by React, Angular, Node, Django, and many more.

• adambard/learnxinyminutes-docs - Code documentation written as code! How novel and totally my idea!.

• awesomedata/awesome-public-datasets - A topic-centric list of HQ open datasets.

• trimstray/the-book-of-secret-knowledge - A collection of inspiring lists, manuals, cheatsheets, blogs, hacks, one-liners, cli/web tools and more.

• dwmkerr/hacker-laws - Laws, Theories, Principles and Patterns that developers will find useful.

• learn-anything/learn-anything - Organize world's knowledge, explore connections and curate learning paths.

• kdeldycke/awesome-falsehood - Curated list of falsehoods programmers believe in.

• google/eng-practices - Google's Engineering Practices documentation.

• ripienaar/free-for-dev - A list of SaaS, PaaS and IaaS offerings that have free tiers of interest to devops and infradev. https://free-for.dev.

• dumb-password-rules/dumb-password-rules - Shaming sites with dumb password rules.

• psenough/teach_yourself_demoscene_in_14_days - guidebook idea from here.

• heroku/12factor - 12factor.net.

• Igglybuff/awesome-piracy - A curated list of awesome warez and piracy links.

• jondot/awesome-react-native - Awesome React Native components, news, tools, and learning material!

• fpereiro/backendlore - How I write backends.

• lirantal/nodejs-cli-apps-best-practices - The largest Node.js CLI Apps best practices list.

• semver/semver - Semantic Versioning Specification.

• erikwiffin/0.30000000000000004 - Floating Point Math Examples.

• olivierlacan/keep-a-changelog - If you build software, keep a changelog.

• carloscuesta/gitmoji - An emoji guide for your commit messages.

• ErikCH/DevYouTubeList - List of Development YouTube Channels.

• 2factorauth/twofactorauth - List of sites with two factor auth support which includes SMS, email, phone calls, hardware, and software.

• pirate/wireguard-docs - Unofficial WireGuard Documentation: Setup, Usage, Configuration, and full example setups for VPNs supporting both servers & roaming clients.

• danluu/post-mortems - A collection of postmortems.

• luruke/browser-2020 - Things you can do with a browser in 2020.

• jlevy/og-equity-compensation - Stock options, RSUs, taxes — read the latest edition: https://holloway.com/g/equity-compensation.

• JesseKPhillips/USA-Constitution - A history of edits to the US Constitution as it has been amended. Written in markdown to match original formatting.

• Websites/

  • linode/docs - Linode guides and tutorials. https://linode.com/docs.
  • clarkgrubb/hyperpolyglot - commonly used features in a side-by-side format. https://hyperpolyglot.org.