Alternatives to Ai Engineering From Scratch

《LLM 应用开发实践笔记》：免费开源的中文电子书，把 LangChain、LlamaIndex、RAG、Agent 与 LLMOps 串成一条 LLM 应用开发学习路线。

SapienAI is an open, self-hostable agentic research workspace that unites AI agents with collaborative LaTeX, Typst and Markdown writing.

H4cker is a free GitHub index of ethical hacking, DFIR, bug bounty, and AI security learning resources.

《动手学深度学习》：每个小节都是可运行的 Jupyter 记事本，含 PyTorch、TensorFlow、PaddlePaddle、MXNet 四种框架实现的深度学习教科书。

An illustrated O'Reilly guide by Jay Alammar and Maarten Grootendorst that teaches Python developers to build and refine large language models.

Learn to build a large language model from scratch in PyTorch — a code-first book that codes a GPT-2 class LLM line by line

知乎中文专栏「动手学大模型」：95篇大模型原理与工程实践长文教程

ApacheCN 维护的免费开源中文 AI 学习资源库，覆盖 Python、机器学习、深度学习与 NLP 全栈教程。

Multi-agent research that turns questions into sourced decks, models, and apps

Open-source research agent that plans, reads sources in parallel, and writes cited reports you host yourself

K-Dense BYOK runs 326 scientific workflows as a free desktop AI co-scientist on the model keys you already own.

Free AI-powered scientific paper search with TLDR summaries, citation graphs, and Ask This Paper answers

Andrew Ng's applied AI school: 130+ short, code-first courses on agents, RAG, and prompting, plus team licensing.

Learn Prompting teaches prompt engineering, RAG, and AI security through research-backed courses and certifications.

Basis is a nonprofit AI research lab publishing open work on multi-agent coordination, formal verification, and robot world models.

中文开源 AI Agent 全栈学习路线：110 篇教程、58 万字、30+ 个逐章验收项目，带零基础走到自建 MCP Server。

Perplexity Patents is a conversational AI patent search agent that finds prior art in plain language, with citations.

ScienceClaw is a loop-engineered research agent that plans, executes, checks and iterates on multi-step scientific tasks.

Deconstructor is a free browser-based tool that turns any word into an interactive, editable graph of its prefixes, roots, and suffixes.

An MIT-licensed GitHub repo that rescans AI projects every six hours and publishes auditable ranked leaderboards.

Free AI-assisted PubMed search — plain-language queries, unlimited chat, and structured PDF research reports.

A browser canvas where you and your team place AI generation next to the source material it should use.

Paper Notes turns 26,000+ AI conference papers into free five-minute summaries you can browse by conference and subfield.

Search and download a free corpus of 81,735 modern Chinese poems by 3,489 poets — open-access Chinese poetry data.

Free browser-based deep search for public info on people, topics, and organizations.

Chinese-language LLM courses covering RAG knowledge bases, AI Agent development, and model fine-tuning — plus a 6K+ star interview question

Scite.ai's Smart Citations show whether later research supported or contradicted a scientific claim, sentence by sentence.

Academic summarizer that turns papers, PDFs and videos into interactive summary flashcards you can study and reuse.

Build reusable Claude skills that turn your procedures and brand rules into consistent output on every run

Anara is a science-focused AI research workspace that searches 300M+ papers, answers across your own library, and cites the exact passage behind every answer.