Learn various programming languages, for free. If you are a programmer, you probably came across this website multiple times through Google.

"Learn Git Branching" is the most visual and interactive way to learn Git on the web; you'll be challenged with exciting levels, given step-by-step demonstrations of powerful features, and maybe even have a bit of fun along the way.

Learn how to type faster 🎯. Take typing lessons on touch typing tutor Ratatype 💻, practice your keyboarding skills online, take a typing speed test and get typing speed certificate for free.

Native Land is an app to help map Indigenous territories, treaties, and languages.

PDF Drive is your search engine for PDF files. As of today, they have 80 million eBooks for you to download for free. No annoying ads, no download limits.

Hydra is an open-source, column-oriented Postgres that allows users to query billions of rows instantly without making code changes. It provides lightning-fast performance, zero setup, and full customization options. With Hydra, users can unify, report, and share data, defeating…

A simple web app that makes it easy to learn the notes and practices scales on the guitar. Try out different tunings and highlight/play the notes of specific scales on the fretboard.

Hacker News is a treasure, and not only to discuss news. 99% of the best content was not created today. This site aggregates old articles that get reposted on Hacker News, so that you have a chance to read the best ones. It's the equivalent of your cozy neighbourhood library, if…

Red Blob Games is a website that offers interactive visual explanations of math and algorithms, using motivating examples from computer games. The website has been curating game development articles since 1990 and provides free access to all articles without any signup or ads. T…

Unriddle is a tool for better, faster research. Upload your sources, interact with them via GPT-4, start writing and you'll be shown the most relevant content from your library at the exact moment you need it.

Website that tries to make history classes more interesting and intuitive via visuals.

Why, even in peacetime, do friends become enemies? And why, even in wartime, do enemies become friends? This simulation attempts to use game theory to explain our epidemic of distrust – and how we can fix it!

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You don't know SQL. Aside from basic CRUD statements, you haven't used any advanced database features. This free ebook will share many easy-to-copy recipes to make development faster by using a lot of stuff you probably never heard of.

Google's machine learning image recognition software. It will try to guess what you are drawing, while you are drawing it !

Expand your vocabulary with a daily email containing definitions 📚, pronunciations 🗣️, etymologies 📜, and examples ✍️!

CryptoZombies is an interactive code school that teaches you to write smart contracts in Solidity through building your own crypto-collectables game. The course is beginners friendly and is available for free (no strings attached!).

Open up your phone on your next date night and select a deck depending on who you’re with (either friends or lovers). Take turns flipping through cards and answering questions to deepen your relationship and learn more about one another.

Untools is a curated collection of tools to help you solve problems, make decisions and understand systems. Discover new thinking tools and how to use them.