😎 List of helpful resources added by the community for the community!

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• Algorithms
• Android
• Angular
• Blockchain
• Bots
• C
• C++
• Computer Science
  • Theoretical Computer Science
• CSS
• CSharp
• Dart
• Data Science
• Deep Learning
• DevOps
• Django
• Docker
• Express
• Ethical Hacking
• Expo
• Fundamental CP algorithms
  • Algebra
  • Combinatorics
  • Data Structures
  • Dynamic Programming
  • Graph Theory
  • Linear Algebra
  • String Processing
• Flutter
• GIT
• GitHub
• Go
• GraphQL
• HTML
• Ionic
• Java
• Javascript
• Laravel
• LESS
• Linux
• Machine Learning
• Magento
• MySQL
• NodeJS
• PHP
• PostgreSQL
• Python
• React
• React Native
• Ruby
• Rust
• Sass
• Spring
• Svelte
• Swift
• System Design
• Terraform
• Testing
• Typescript
• Unity
• Vue
• Web Accessibility
• Webpack
• Others
  • Cheat Sheets
  • Design
  • Free Hosting
  • Open Source
  • Standard Template Library
  • VS Code
  • Tools
  • Talks and Podcasts

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• Vogella Tutorials
• Android Basics with Kotlin Course
• Build your first app
• Official Documentation
• Android™ Notes for Professionals book
• Android Developer Roadmap
• Android cheat sheet
• Android Tips & Tricks
• Awesome Android

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• Egghead.io - Angular
• Egghead.io - Build Redux Style Applications with Angular2, RxJS, and ngrx/store
• HiRez.io - Angular Basics
• HiRez.io - Angular In Depth - Components
• udemy - Introduction to Angular 2
• udemy - Angular 2 with TypeScript for Beginners: The Pragmatic Guide
• udemy - The Complete Guide to Angular 2
• Pluralsight - Angular 2: First Look
• Pluralsight - Angular 2: Getting Started
• Angular Material - Material Design components for Angular
• Angular Powered Bootstrap - Bootstrap widgets for Angular
• freeCodeCamp.org - Learn Angular - Full Tutorial Course

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• KnowEthereum (handpicked ethereum resources)

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• Simple Twitter Bot Tutorial with Node.js
• Create a Simple WhatsApp Chatbot without Coding
• Build Your First Wit App
• How to Make a Twitter Bot in Python With Tweepy
• Discord.JS v13 - Make your own Discord bots by following this video series

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• C Full Course
• C Programming for Beginners
• Learn C Org

• CP Algorithms
• List of specified topics
• How to Learn the C++ Languages: The Ultimate List
• The C++ Standard Template Library (STL)
• C++ Series GeeksForGeeks
• LearnCPP
• C++ Tutorial
• C++ API Reference

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• Awesome Awesomeness
• CS50
• Khan Academy
• Open Source Society University - Path to a free self-taught education in Computer Science!
• Teach Yourself Computer Science

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• Agda usage
• Freely available programming books
• Programming Language Foundation in Agda
• Type Theory playlist

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• 30SecondsOfCode CSS Snippet
• A Complete Guide to Flexbox
• CSS Framework - Bootstrap
• CSS Framework - Bulma
• CSS Framework - Materialize
• CSS Framework - Tailwind CSS
• CSS Flexbox - Wes Bos
• CSS Grid - Wes Bos
• CSS Grid - Leonidas Esteban
• CSS Box-Shadow Generator
• CSS Gradient Generator
• CSS Animated Gradient Background Generator
• CSS Grid - A simple visual cheatsheet by Malven
• CSS Flex - A simple visual cheatsheet by Malven
• CSSBattle
• Learning Advanced CSS and HTML
• Style Stage - A modern CSS showcase styled by community contributions
• Tailwind CSS Tutorial for Beginners - Full Course
• Introduction to CSS

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• 5 books every C# developer should read
• C# From a Java Developer's Perspective
• C# Microsoft Docs
• The C# Yellow Book

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• Asynchronous programming: futures, async, await
• Books about Dart
• Dart Cheatsheet
• DartPad in tutorials: best practices
• Dart videos from Google
• Dart Tutorial for Beginners: Basics and Fundamentals for Flutter
• Intro to Dart for Java Developers
• Iterable collections

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• DPhi-Data Science Courses
• Data Science Methodology
• Data Science Cheat Sheets
• IBM Data Science Coursera
• Introduction to Data Science with R
• Machine Learning Algorithms from Scratch
• Python for Data Science: Fundamentals
• Python for Data Science: Intermediate

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• Andrew Ng's Deep Learning Specializations Course
• Convolutional networks CS231n
• Deep Learning Fundamentals
• Deep learning cheat sheet
• Google AI Blog
• Natural Language Processing CS224n

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• Django Documentation
• Deploy Django Application on Heroku
• Everything about using Celery with Django

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• Azure DevOps
• Agile vs Devops
• Become a DevOps Engineer - Linkedin Learning
• Dev Op Terms
• DevOps for Dummies - by IBM
• DevOps Roadmap for beginners
• How To Become a DevOps Engineer In Six Months or Less

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• Docker Overview & Basics
• Docker for beginners
• Docker Curriculum Ebook
• Docker Labs environment
• Docker labs

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• LinkedIn Login using Node JS, Express and passport
• Web Development with Node and Express
• Express Web Application Developement
• Curated ExpressJS Courses - a list of community curated resources
• ExpressJS Courses at Classpert - a list of courses (free and paid) from Classpert Online Course Search
• Security Practices in Express App

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• List of helpful algos
• Stanford University Algorithms: Design and Analysis, Part 1
• Stanford University Algorithms: Design and Analysis, Part 2
• Sorting Algorithms - mycodeschool

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• Collection of hackers, pentesters & security researchers
• Ethical Hacking from Scratch
• Open Source Reverse Engineering Platform
• Penetration Testing Bootcamp
• Practical-Ethical-Hacking-Resources

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• Expo Crash Course by Traversy Media

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• Binary Exponentiation
• Euclidean algorithm for computing the greatest common divisor
• Extended Euclidean Algorithm
• Fibonacci Numbers
• Linear Diophantine Equations

• Binomial Coefficients
• Catalan Numbers
• Finding Power of Factorial Divisor

• DSA + Java Interview Preparation Course
• DSA + C++ Interview Preparation Course
• Data Structures
• Minimum Stack / Minimum Queue
• Princeton University Algorithms, Part 1
• Princeton University Algorithms, Part 2
• Sparse Table
• This is CS50x - David J. Malan
• IIT Bombay Foundation of Data Structures (CS213.1x)
• Intro to Data Structures and Algorithms - Brynn Claypoole, Horatio Thomas

• Divide and Conquer DP
• Dynamic Programming on Broken Profile. Problem "Parquet"
• Dynamic Programming GeeksforGeeks
• Finding the largest zero submatrix

• Gauss & System of Linear Equations
• Gauss & Determinant
• Kraut & Determinant
• Rank of a matrix

• Aho-Corasick algorithm
• Prefix function - Knuth-Morris-Pratt
• Rabin-Karp for String Matching
• String Hashing
• Suffix Array
• Z-function

• Introduction to Graph Theory
• Breadth First Search
• Depth First Search
• Shortest Path (Dijkstra's Algorithm)
• Shortest Path with Negative Weights (Bellman Ford Algorithm)
• Minimum Spanning Tree (Prim's Algorithm)
• Minimum Spanning Tree (Kruskal's Algorithm)
• Max Flow (Ford-Fulkerson and Edmonds-Karp Algorithms)
• Striver's Graph Series

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• Adding Google Maps to a Flutter app
• Animation in Flutter
• Building beautiful UIs with Flutter
• Building Beautiful Transitions with Material Motion for Flutter
• Building a Cupertino app with Flutter
• Build a Photo Sharing app with Google Photos and Flutter
• Firebase for Flutter
• Flutter Tutorial for Beginners - YouTube
• Flutter Animation Tutorial - YouTube
• Flutter & Firebase App Build - YouTube
• Flutter Documentation
• How to test a Flutter app
• Reactive Programming with Flutter
• Write your first Flutter app, Part 1
• Write your first Flutter app, Part 2
• Write a Flutter desktop application

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• Pro Git Book
• Udacity's Git Commit Style Guide
• Learn Git Branching: A beautiful visual guide to learn simple and advanced Git.
• Git notes for Professionals Book
• Introduction to Git and Github ebook - Bobby Iliev(Markdown, PDF)
• Introduction to Git and Github - Launch School
• Git Immersion
• 30SecondsOfCode Git Snippets
• Git - the simple guide
• Oh My Git: Open source Git learning game.
• Git Exercises by Fracz
• A Visual Git Reference
• GIT PURR! Git Commands Explained with Cats
• Top GitHub best practices for developers
• Learning Git By Atlassian
• An Introduction to Git and GitHub by Brian Yu
• Git Documentaton
• Dangit, Git!?!
• Using multiple Git accounts with SSH keys
• How to Write a Git Commit Message

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• How to create a pull request in GitHub
• Squash mutilple commits into one in GitHub
• GitHub Learning Lab
• Hands-on-experience-of-git-commands
• Step by Step Guide to Contributing on GitHub
• GitHub Protips: Tips, tricks, hacks, and secrets from Lee Reilly
• GitHub Minesweeper: hands-on introduction to working with Git and GitHub in a team
• Readme.so: Easiest way to make good readme for your github repos
• Complete Git and Github Tutorial

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• A Tour of Go - A Complete Tour of the Go Programming Language.
• Go by Example
• Gophercises: Free Coding Exercises for Budding Gophers
• Learn Go with Tests
• 50 Shades of Go: Traps, Gotchas, and Common Mistakes for New Golang Devs
• Golang for begineers - YouTube playlist
• Let's go with golang - YouTube playlist

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• GraphQL tutorial for beginners
• GraphQL Tutorials
• Complete App with GraphQl

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• Netlify
• Heroku
• Vercel
• Github Pages
• Gitlab Pages
• Deta
• InfinityFree

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• HTML Cheat sheet by CodeWithHarry
• 5 HTML Tricks Nobody is Talking About
• HTML CheatSheet
• HTML documentation for beginners
• HTML tutorial for beginners
• Build your first HTML Project
• Introduction to HTML

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• Angular to React for Ionic Developers
• Add a Firebase Database to your Ionic App
• Awesome Ionic - A curated list of awesome Ionic libraries, resources, and solutions from Ionic 1 to the latest version of the framework
• Building an Ionic JWT Refresh Token Flow

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• Learn Java - Free Interactive Java Tutorial
• 10 Simple Java Projects for Beginners
• Advanced Java Programming
• Learn Servlet Tutorial
• Object Oriented Programming in Java
• Learn Java Programming Language Step by Step
• Java Full Course
• Java Programming - Test Automation University
• Java Programming - University of Helsinki
• Learn Java 8 - Full Tutorial for Beginners - freeCodeCamp
• Java Beginner Course - freeCodeCamp
• Java Tutorial for Beginners - Programming with Mosh
• Java + DSA + Interview Preparation Course

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• Learn How JavaScripts works Behind the Scene by Akshay Saini
• CoderslangJS
• Beginner JavaScript Notes + Reference by Wes Bos
• Learn Modern JavaScript ES6 | ES7 | ES8
• Learn JavaScript through a game
• JavaScript ES2020 - The Features You Should Know
• S.O.L.I.D. Principles around You, in JavaScript
• The 30 days JavaScript Challenge
• JavaScript: Understanding the Weird Parts
• Full Stack Javascript course by The Odin Project
• Building Front-End Web Apps with Plain JavaScript
• JavaScript for impatient programmers
• The Modern JavaScript Tutorial
• 20 Killer JavaScript One Liners ☝️
• You Don't Know JS Yet (book series)
• 30SecondsOfCode JavaScript Snippets
• Full Stack open 2021
• Demystifying JavaScript Promises - A New Way to Learn
• Favorite JavaScript Utilities in single line of code! No more!
• JavaScript CheatSheet by DaveChild
• Introduction to JavaScript
• Free js.org Subdomain For Github Pages
• Eloquent JavaScript - A Modern Introduction to Programming
• JavaScript Garden
• JavaScript by Example - Level 1 by Hussein Nasser
• JavaScript by Example - Level 2 by Hussein Nasser
• Namaste JavaScript

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• Understanding Kubernetes: Developer's Guide
• Kubernetes Hands On & Training

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• OpenShift Interactive Learning Portal
• OpenShift Tutorials

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• Official Documentation
• Video Tutorials for Laravel
• Serverless Deployment for Laravel
• Micro Laravel Framework for APIs
• Server Management for Laravel
• Creating "Laravel Checklister"

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• Official Documentation
• Complete tutorial from Tutorialpoint
• Less CSS Tutorials for Beginners Playlist

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• Introduction to Linux\
• Linux kernel and its insides
• Interactive map of Linux Kernel
• Linux Device Drivers, Third Edition

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• Google's Machine Learning Crash Course
• Andrew Ng's Machine Learning Coursera Course
• Intro to Machine Learning
• Intermediate Machine Learning
• Understanding Machine Learning: From Theory to Algorithms
• Probability and Statistics
• freecodecamp's courses for machine learning
• A quick review of the linear algebra concepts relevant to machine learning.
• Calculus
• Statistical concepts for machine learning
• AWS Machine Learning Tools
• Introductory Primer
• Machine Learning Roadmap
• TinyML Course
• Machine Learning Introduction with Python
• Machine Learning Guide Podcast

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• Fast Virtual Machine for Magento2
• Docker Configuration for Magento2
• Become Magento 2 Developer with Mage Mastery (online courses and workshops)

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• MySQL Tutorial
• MySQL - The Basics // Learn SQL in 23 Easy Steps - Fireship
• MySQL Crash Course - Traversy Media
• MySQL Tutorial for Beginners - Programming with Mosh
• SQL Tutorial - Full Database Course for Beginners - freeCodeCamp
• MySQL Database - Full Course - freeCodeCamp

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• Introduction to nodejs
• Beginners guide to nodejs (step by step)
• Node JS Architecture
• Deploy Node App on AWS EC2
• 30SecondsOfCode Node JS Snippets
• The only NodeJs introduction you’ll ever need
• Introduction to Node.js
• Back End Development and APIs

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• PHP: The Right Way
• PHP Front to Back
• PHP Apprentice: An Online Book For Learning PHP
• Learn PHP - SoloLearn
• 40+ Useful Php tips for beginners
• PHP Cheat Sheet
• Design Patterns

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• SQL Cheat Sheet - ABZ-Aaron
• PostgreSQL Tutorial
• Learn PostgreSQL Tutorial - freeCodeCamp
• SQL Tutorial for Beginners - Ben Awad
• SQL Tutorials - Corey Schafer

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• Automate The Boring Stuff With Python
• Python Intermediate Tutorial
• Python Tutorial
• Python for Everybody (14 hour course)
• Python Tips and Tricks for Beginners
• The Hitchhiker's Guide to Python
• Python Tips and Tricks for Beginners
• Python Tutorials with online IDE
• Python 3 Basics Tutorial Series - YouTube
• Learning Python: From Zero To Hero
• Automate the Boring Stuff with Python
• Complete Python Tutorial In Hindi - YouTube
• TheAlgorithms/Python: All Algorithms implemented in Python
• 30SecondsOfCode Python Snippets
• Selenium with Python Tutorial
• Python Flask Tutorial

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• React Tutorial - W3Schools
• Egghead.io: Start Learning React
• React Official Tutorial
• Using React in Visual Studio Code
• Scrimba - Learn React for free interactively
• FreeCodeCamp React Challenges
• React Cheatsheet
• React Patterns
• Useful Packages you should know in React
• Learn React Test Driven Development
• ReactJS Tutorial for Beginners
• The React Beginner's Handbook
• React.js Clones by PAPA React
• Full-Stack Web Development with React Specialization
• React Custom Hooks Tutorial
• 10 react hooks explained
• React Hooks

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• React Native Tutorial
• Performance Limitations of React Native and How to Overcome Them
• VSCode setup for React Native
• Build E-Commerce App in React Native
• How to deploy react native apps

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• Ruby from Tutorialspoint
• Full course by freeCodeCamp.org
• Full Stack Ruby and Ruby on Rails course by The Odin Project
• Full Stack Ruby Online course at App Academy Open - required login to access

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• The Rust Programming Language book
• Rustlings - small exercises to get you used to reading and writing Rust code
• The Rust Lang Book video series by Let's Get Rusty

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• Complete Documentation
• Zurb - Library to Create Transitions & Animations
• Vanilla Framework
• Susy - Grid Layout Engine

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• Getting Started - Building an Application
• Spring Security Architecture
• Building a RESTful Web Service

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• Introduction and basics of Svelte
• Getting started with Svelte - MDN
• Svelte for beginners - The Net Ninja
• Learn the Svelte JavaScript Framework: Full Course - Freecodecamp

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• Swift Tutorial
• Build your very first iOS app
• Swift Programming Tutorial for Beginners
• Documentation
• Swift UI quick start

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• System Design Concepts
• System Design Primer Course
• System Design Interview Preparation Series by codeKarle
• Basics of System Design by Coding Simplified

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• Terraform Study Guide
• HashiCorp Certified: Terraform Associate 2021 (Zeal Vora)
• Deep Dive - Terraform (Pluralsight)
• Terraform Course - Automate your AWS cloud infrastructure
• Terraform for DevOps Beginners + Labs: Complete Step by Step Guide!
• 250 Practice Questions For Terraform Associate Certification

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• How to Start a Career in Testing?
• Testing React with Jest and Enzyme
• TestProject: Free Test Automation For All
• Apache JMeter
• API Testing 101: Learn The Basics
• ISTQB Certification

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• TypeScript Documentation: Handbook
• Scrimba - Introduction to TypeScript
• Typescript - The Basics
• Typescript Basics - Course
• Clean Code concepts adapted for TypeScript
• TypeScript Course for Beginners 2021 - Learn TypeScript from Scratch!

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• Unity Docs
• Official Unity Learn Page
• Unity for Beginners

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• Vue JS 3 Tutorial for Beginners - Youtube Playlist of a Series of 12 Videos
• Using GitLab CI/CD to auto-deploy your Vue.js application to AWS S3
• Dockerizing a Vue App
• Deploying a Flask and Vue App to Heroku with Docker and Gitlab CI
• Large-scale Vuex application structures

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• Web Accessibility Evaluation Tools List
• Mozilla Accessibility Guide
• Google Developers Guide on Accessibility
• Accessibility Testing Tutorial - A Complete Step By Step Guide

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• Getting Started Guide
• Webpack Academy
• Docs
• Tutorials

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• Markdown
• Emmet
• List of Badges, in Markdown
• Cheatsheet Collection
• Cheat Sheets
• Programming Cheat Sheets
• Python Cheatsheet
• Devhints - TL;DR for developer documentation
• Linux Commands Cheat Sheet
• Codehouse - Cheatsheet Collection
• CSS Cheat Sheet

• Freebie Supply
• unDraw: Free illustrations, updated regularly
• Feather Icons
• humaaans
• absurd
• Crello Free Templates
• 404 Illustration: Free illustrations for 404 pages
• Humaans: Mix-&-match illustrations of people with a design library
• UI Design Daily: Awesome UI Components of all types
• Freepik: Find Free Vectors, Stock Photos and PSD
• Geometric Shapes: Free Geometric Shapes to use in Figma and download
• 3D-Icons: Free 3D - Icons to download
• 533 Hand-Picked Tools & Resources for Web Designers & Developers
• Illlustrations: Awesome 120+ free illustrations
• ls.graphics: Free mockups for different type of products
• Unsplash: Free high quality stock images and videos
• Undesign: Collection of free design tools and resources for makers, developers and designers
• DopeUI: High quality website UI templates
• Coolors: The super fast color schemes generator
• uiGradients: An awesome gradient generator
• Glassmorphism Generator: Amazing tool to generate glassmorphism design.
• Canva
• Photopea: Free online editor supporting PSD, XCF, Sketch, XD and CDR formats.
• Lorem Ipsum Generators: Awesome collection of Lorem Ipsum Generators
• Font Awesome: Vector icons and social logos for your website
• SVG Backgrounds: Customize and apply backgrounds fast.
• Vecteezy: Download Free Vector Art, Stock Photos & Stock Videos.

• How to contribute to Open Source
• What open source projects should I contribute
• Why Open Source is Important for Students?

• C++ Standard Template Library in Practice
• Learn C++ STL by reading documentation

• How to run graphics.h in VS Code
• Top 5 VS Code extensions for web developers
• VS Code Tutorial for Beginners
• The Best VS Code Extensions to Supercharge Your Git

• Tiny helpers: A collection of free single-purpose online tools for web developers

• Coding Better World Together Live Session with Uncle Bob (Robert C. Martin : Coding Better World Together is a set of master lessons from the famous Uncle Bob (Robert Cecil Martin), where he gives us a broad vision of the importance and future of Software in today's society.
• Clean Code with Uncle Bob Martin: When folks code long enough, in time they get themselves stuck in a code base that's kind of difficult to wrap thier heads around. In this podcast Uncle Bob Martin talks about the principles of clean code and how to not make a code base too difficult to understand.