Student Hub

CS50x

Harvard's introduction to computer science, free to audit online.

freeCodeCamp

Project-based web development curriculum with free certifications.

Khan Academy

Free lessons and practice across maths, science and economics.

MIT OpenCourseWare

Course materials, lecture notes and problem sets from MIT courses.

The Odin Project

Free full-stack curriculum built around building real projects.

CS50 Python

Harvard's Python-focused introduction with problem sets and a free certificate audit.

CS50 Web

HTML/CSS, Django, JavaScript and SQL taught through real projects.

CS50 AI with Python

Search, knowledge, uncertainty and machine learning in twelve weeks.

MIT 6.100L Intro to CS with Python

Full MIT lecture series for the famous intro programming subject.

Machine Learning Specialization

Andrew Ng's updated ML specialization; every course can be audited free.

Google Data Analytics Certificate

Eight-course path from spreadsheets to R; fully auditable without paying.

IBM Data Science Professional

Python, SQL and capstone projects from IBM; audit available per course.

Meta Front-End Developer

React-first front-end curriculum by Meta engineers, free to audit.

Google UX Design Certificate

Research, wireframing and portfolio projects for UX beginners.

Kaggle Learn

Short hands-on micro-courses on Python, ML, SQL and data viz with badges.

Sololearn

Mobile-first bite-size coding lessons across a dozen languages.

NPTEL

IIT/IISc recorded courses across engineering and sciences, free to study.

SWAYAM

India's government MOOC platform with free courses and optional certification.

NASSCOM FutureSkills Prime

AI, cloud and digital-skills pathways subsidised for Indian learners.

The Odin Project - JavaScript Path

Project-driven route from HTML basics through React and Node.

Full Stack Open

University of Helsinki's React, Node, GraphQL and TypeScript course.

CS50 Cybersecurity

Practical security thinking: threats, crypto and risk, from Harvard.

MIT Missing Semester

Shell, Git, debugging and tooling skills lectures skip over.

Codecademy free catalog

Interactive basics of many languages; the foundations courses are free.

Devhints

Dense one-page cheat sheets for tools, languages and command lines.

Programiz PRO (free tier)

Structured beginner tutorials and an online compiler for Python, C and Java.

Mode SQL Tutorial

Interactive beginner-to-analytic SQL lessons run in the browser.

Striver's A2Z DSA Sheet

A famously complete DSA roadmap of ~450 problems in order.

Algorithms explained - TheAlgorithms site

Visual explanations of classic algorithms linked to clean implementations.

Django Girls Tutorial

Friendly first web application with Python and Django, start to deploy.

SQLBolt

Learn SQL in an afternoon with short interactive lessons.

RegexOne

Learn regular expressions step by step with instant practice problems.

Git Immersion

Guided lab-style walk through Git fundamentals in ~50 steps.

free-programming-books

Vast index of freely available programming books and courses by language.

public-apis

Directory of free public APIs grouped by topic, with auth and HTTPS noted.

build-your-own-x

Step-by-step guides to rebuild real technologies from scratch to learn them.

TheAlgorithms

Readable algorithm implementations across dozens of programming languages.

freeCodeCamp

Open-source codebase behind the free full-stack curriculum.

regex101

Build and debug regular expressions with a live explanation of each token.

LibreOffice

Complete offline office suite: documents, spreadsheets and slides.

Omni Calculator

Thousands of specialised calculators with the formula shown alongside.

roadmap.sh

Visual step-by-step learning paths for developer and data roles.

GitHub Student Developer Pack

Bundle of developer tools offered free to verified students.

Zotero

Reference manager that collects sources and generates citations.

Obsidian

Local-first markdown notes with linking and a large plugin ecosystem.

Anki

Spaced-repetition flashcards that schedule reviews for you.

Overleaf

Collaborative LaTeX editor in the browser with a free plan.

FlowCV

Builds clean, ATS-friendly resumes and exports them as PDF.

Notion

Docs, databases and wikis in one workspace with a free personal plan.

Wolfram Alpha

Computational answers for maths, science and unit-heavy questions.

Kanopy

Curated films and documentaries, free through participating libraries.

Project Gutenberg

Tens of thousands of public-domain ebooks in open formats.

Open Library

Borrow scanned books digitally from the Internet Archive's lending library.

Monkeytype

Minimal typing test with detailed stats and no clutter.

Eloquent JavaScript

The free online book that teaches JS deeply, with an in-page sandbox.

javascript.info

The Modern JavaScript Tutorial - exhaustive, free and translated widely.

Exercism

Practice exercises in 70+ languages with free human mentoring.

Project Euler

Math-plus-programming puzzles that build genuine problem-solving muscle.

3Blue1Brown

Visual mathematics explainers, including a clear neural-network series.

freeCodeCamp.org

Full-length free course videos across programming and data topics.

Ali Abdaal

Study technique and productivity videos aimed at students and professionals.

Andrej Karpathy

From-scratch neural network lessons by a former Tesla AI director.

Web Dev Simplified

Clear short lessons on JavaScript, React and CSS concepts.

Traversy Media

Crash courses on nearly every web technology and framework.

Alex The Analyst

Full data-analyst career paths: SQL, Excel, Tableau and portfolio projects.

Luke Barousse

Data analytics tutorials grounded in real job-market salary data.

Ken Jee

Data science careers, portfolios and practical project advice.

StatQuest with Josh Starmer

Statistics and machine learning concepts broken into tiny clear pieces.

Data School

Focused scikit-learn and pandas lessons for working analysts.

Mark Tilbury

Money habits and side-income ideas aimed at younger viewers.

Ankur Warikoo

Personal finance and career advice in Hindi and English for Indian audiences.

Thomas Frank

Productivity systems, Notion templates and study strategies.

Mike and Matty

Study techniques and learning science from two med school friends.

Ishan Sharma

Career, freelancing and startup interviews for Indian students.

Varun Mayya

Building companies and creator businesses from India, documented openly.

Apna College

Placement-focused DSA and development courses taught in Hindi.

CodeWithHarry

Beginner-friendly web dev and Python playlists in Hindi.

CS Dojo

Gentle Python and data-structures lessons for absolute beginners.

Programming with Mosh

Polished full-length courses on Python, JS, C# and interview prep.

Bro Code

Long-form language courses plus bite-sized concept explainers.

Tech With Tim

Python, Discord bots and modern web projects step by step.

Corey Schafer

Widely considered the cleanest Python tutorials on YouTube.

take U forward (Striver)

Structured DSA sheets that thousands use for placement preparation.

r/learnprogramming wiki

A maintained index of free courses, books and project ideas for beginners.

r/AskHistorians books & resources

Historian-vetted reading lists organised by period and region.

Edit any GitHub repo in a browser IDE

Press `.` on any GitHub repository to open it in a full editor in the browser.

Run two Android apps side by side

Split-screen makes note-taking while reading much less painful.

Get new papers emailed to you

Google Scholar alerts keep a literature review current without re-searching.

Batch every task under two minutes

Collecting tiny tasks into one short block beats interrupting deep work.

Perplexity

Answer engine that cites its sources, so claims can be checked.

GitHub Copilot

AI code completion inside your editor.

NotebookLM

Upload your own sources and ask grounded questions about just those documents.

Elicit

Searches academic papers and extracts findings into a comparable table.

Eye2.ai

Ask one question and compare answers from many AI models side by side.

Ideavo

Build web apps by chatting with AI, using your own provider API key.

r/FreeEBOOKS

Author- and publisher-approved free ebook offers, posted daily.

r/Documentaries

Free-to-watch documentaries, most of them hosted by the original broadcaster.

r/writing

Craft discussion plus a wiki of free tools, prompts and publishing advice.

r/GetStudying

Study systems, focus methods and free study resources from students.

r/FREECOURSES

Course coupons and permanently free classes posted by the community.

REST Countries

Country profiles: flags, capitals, currencies, languages and timezones.

PokéAPI

Every Pokémon's stats, moves, evolutions and sprites, fully keyless.

SWAPI

The original Star Wars data API - films, characters, planets, starships.

Open Trivia DB

Quiz questions across categories and difficulty, session tokens included.

DummyJSON

Fake products, carts, users, recipes and auth flows for prototyping.

JSONPlaceholder

The classic fake REST API of posts, todos and albums for demos.

Wikipedia API

Search, summaries and full article content from Wikipedia, keyless.

Open Library

Books, authors, covers and reading lists from the Internet Archive.