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A free GitHub repository (46k stars) aggregates English learning resources. The author, a top scorer in the Gaokao English exam, aims to help those who have been working for years to restart their English learning, replacing expensive training institutions.
A comprehensive, open-source AI engineering curriculum with 435 lessons across 20 phases, covering everything from linear algebra to multi-agent systems, available for free on GitHub.
A free comprehensive step-by-step projects roadmap for becoming an AI researcher, covering topics from tokenizers to full capstone model systems.
A set of free MIT lecture notes on matrix calculus for machine learning, combining rigorous mathematics with visual explanations.
Cursor's head of AI engineering shares a 14-minute free resource on how to build autonomous coding agents that ship production code, revealing architectural insights that a $1,000 vibe-coding course won't teach.
A developer created a free 40-minute breakdown explaining 20 key AI concepts behind models like Claude and ChatGPT, covering tokenization, attention, RAG, agents, and more, aiming to provide practical mental models for builders.
A free, open-source AI engineering curriculum on GitHub with 435 lessons, teaching from raw math to production deployment across multiple languages.
Anthropic released a free Prompting Playbook covering control cases, edge cases, and human handoff, providing a practical evaluation suite for prompt engineering.
A developer shares a free, comprehensive tutorial on building a full SaaS product inside Lovable, covering planning, frontend/backend, AI features, Stripe payments, and deployment.
A senior Microsoft AI developer shows a free tutorial on building AI agents with Claude. 34 minutes long, containing 1400+ pre-built MCP tools, ready for production deployment.
A free 34-minute workshop recording from Microsoft's Code with Claude event shows how a Microsoft Senior AI developer builds AI agents using Claude and 1,400+ pre-built MCP tools, from setup to production.
A Stanford lecture explaining how ChatGPT and Claude are built is available for free, as shared on Twitter.
A comprehensive open-source AI engineering curriculum with 20 phases and 416 lessons across Python, TypeScript, Rust, and Julia, teaching algorithms from math foundations to autonomous swarms.
An AWS engineer has created free, structured notes summarizing both volumes of Alex Xu's System Design Interview book, available on GitHub and via the website Pagefy.io.
Anthropic released a free 24-minute workshop presented by the Claude team on how to write prompts, no registration or paywall required.