Download Activity Books

Download Activity Books

Fun, Learning, & Challenging

We publish activity books containing exciting puzzles and brainteasers every day! Our books are free to download and share.

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A fun platform to learn about cryptography through solving challenges and cracking insecure code. Can you reach the top of the leaderboard?
For every student, every classroom. Real results. We’re a nonprofit with the mission to provide a free, world-class education for anyone, anywhere.
A library for audio and music analysis and feature extraction, can be used to study the classification, separation, music information retrieval (MIR), ASR and other tasks in the audio field.
This web app allows users to learn Morse code in a fun and interactive way. It is completely free and ad-free. The app features an interactive device that helps users practice and improve their Morse code skills. Whether you're a beginner or an advanced learner, this app is perf…
Third most popular repo on GitHub with 234k stars. Free ebooks in many languages, covering a lot of subjects related to programming.
LLN is a chrome extension that gives you superpowers over Netflix. It makes studying languages with films/series more effective and enjoyable.
ImageBind is an AI model that binds data from 6 modalities without explicit supervision. It recognizes relationships between images, video, audio, text, depth, thermal and IMUs to advance AI analysis.
The graphing calculator that makes learning maths easier Ergonomic, open source and evolutive, the NumWorks graphing calculator is designed for today’s needs with today’s technologies. NumWorks makes learning maths easier for everyone: professors or students… and it perfectly su…
A subscription tier above Super that gives you access to your own personal, AI-powered language tutor through Explain My Answer and Roleplay, two features developed with the latest OpenAI technology.
There's been a Murder in SQL City! The SQL Murder Mystery is designed to be both a self-directed lesson to learn SQL concepts and commands and a fun game for experienced SQL users to solve an intriguing crime.
Website that tries to make history classes more interesting and intuitive via visuals.
LLM Tracker is a website that provides step-by-step guides for running various machine learning tasks. It also offers information on recent books, LLMs (Language Model Models), evaluations, and learning resources. The website covers topics such as model architecture, Japanese LL…
Each morning, wake up to a new 5-minute lesson delivered to your email inbox. Learn about art, history, and science while enjoying your coffee, for free.
A comprehensive guide to mastering Linux, from choosing a distribution and installation to advanced topics like kernel programming. It's like a free Linux university, but without the exams!
Rapidly expand your vocabulary in another language. Clozemaster is gamified language learning through mass exposure to vocabulary in context.
Lamini is an LLM engine that allows any developer, not just machine learning experts, to train high-performing LLMs on large datasets using the Lamini library. We exist, so every developer can have the superpowers that took the world from GPT-3 to ChatGPT.
BackgroundRemover is an open source command line tool or web app to remove background from images, using machine learning.
Do you want to learn a new language? Language Atlas is the best place to learn a new language for free. I speak 5 languages and will guide you effectively.
AI-powered debates for everyone. Engage in thought-provoking discussions, challenge ideas, and explore new perspectives. Perfect for learning, expanding horizons, and settling disputes