Education

Cybrary

Cybersecurity Courses & Cyber Security Training Online

DIY

Where every kid is a maker & creator!

DIY Genius

Grow Your Health & Wellness Business

Egghead

Learn Web Development from Expert Developers

Frontend Masters

Learn JavaScript, React, and TypeScript to Node.js, Fullstack, and Backend

HDU

HDU is an online judge maintained by Hangzhou Dianzi University

HackerRank

Online Coding Tests and Technical Interviews

Hackerearth

AI Powered Interviews and Assessment

Instructables

Instructables is a community for people who like to make things

Mystery Twister C3

The Cipher Challenge Contest

NovoED

Talent Development Platform

OmegaUp

OmegaUp is a community-based website for competitive programing training

Pearltrees

Pearltrees is a place to organize everything you’re interested in

Platzi

Upload a document and get a real class in minutes, built with Platzi's pedagogy

Problem Classifier

Search problems by keywords or categories. Filter by problems you've not solved

Programming Praxis

A collection of etudes, updated weekly

Programmr

A New Chapter

Python Challenge

Python Challenge home page, The most entertaining way to explore Python

Rankk

Rankk is about solving challenges, discovering and learning new knowledge

SPOJ

The SPOJ platform is centered around an online judge system

School of Data

Digital Literacies for The Tech We Want

Science Exchange

R&D Supplier Onboarding Platform

Sliderule

Upgrade your skills, grow in your career

The Open University

Online Learning Courses and Adult Education

Theoretical Computer Science Stack Exchange

Q&A for theoretical computer scientists and researchers in related fields

Topcoder

Topcoder has been around since 2001

UVa

An old-school problem archive / online judge with rich history

Udacity

Learn the Latest Tech Skills; Advance Your Career

c0d1l1ty

Test Coding Skills Online

tuts+

Learn creative skills from leading industry experts with Envato Tuts+

Sonic Robo Blast 2 Kart

SRB2Kart is a classic styled kart racer, complete with beautiful courses

CSSBattle

CSS Code Golfing is Here!

Cactro

India’s Fairest Technical Test

Divize

Learn, Write, Master: HTML/CSS Through Real UI Challenges

Learn JavaScript

Learn JavaScript in an interactive environment

PracHub

Practice 8,500+ real tech-interview questions from 400+ top companies

Pythonlings

Python learnings, Rustlings-style, in a terminal TUI

React Tutorial

Learn React in an interactive environment

devChallenges

Real-life Projects To Practice Your Skills And Land A Job

Coderbyte

Screen, Assess, & Interview

Lingualia

Learn Languages Online

Treehouse

Learn to Code or Build with AI

kelbyone

Online Photoshop, Lightroom & Photography Courses

Crucial Exams

Ace your certification exams with CrucialExams.com

MarketLeap

Empower Your Future: Learn, Grow, and Succeed with Market Leap Academy!

Newsletter Space Known

Newsletter to learn about space

Sidetrain

Sidetrain is an online marketplace connecting learners

Wise Panda

Wise Panda connects you with verified Chinese tutors

1Transcribe

Accurate. Effortless. Affordable

BeCitizen

A website currently focusing on providing resources/app