Learning resources

A complete book on building AI agents, published free and in the open by Bojie Li, organised around one formula: an agent is a language model plus context plus tools.

A curated index of step-by-step guides for recreating the technologies you use every day.

Find college-level computer science courses with video lectures, sorted by topic.

Get a free domain name, such as one ending in .dpdns.org or .us.kg, and learn step by step how to point it at a website you have built.

A long-running open study guide for designing large-scale systems and preparing for the system design interview.

This is a hands-on tutorial that walks through building a language model entirely from scratch in PyTorch, with no shortcuts through libraries like transformers, trl or peft that normally do the heavy lifting.

Learn to code for free in your browser through interactive challenges, projects and exams that lead to developer certifications.

Find Mac apps for a job, such as a screen recorder, a Markdown editor or an AI assistant, by browsing one long list sorted into categories.

A free hands-on tutorial series on large language models, grown out of two courses at Shanghai Jiao Tong University on frontier language technology and AI security.

Claude How To teaches Claude Code with visual tutorials and copy-paste templates, for developers who have installed it and want working setups.

Learn how AI agents plan, call tools, remember context and work together, one lesson at a time.

Learn to build apps with generative AI, from writing good prompts to making chat, search and image-generation apps.

Find language-model APIs with permanent free tiers and the page where each provider gives out keys.

Learn to build AI apps through example projects, from reading text in images to chatting with your documents.

Learn to build AI systems yourself, from the math behind models to retrieval pipelines and agents, by writing and running real code.

This is the original "Awesome list": a single hub page linking out to hundreds of curated lists of tools, libraries, books and resources, organized by topic — programming languages, security, databases, hardware, and far beyond software into things like business and health.