Alternatives to H4cker

Free 16-chapter Datawhale tutorial that teaches you to build AI agents in Python from first principles

Build every AI algorithm from raw math, free & open source — 523 lessons in 4 languages.

免费开源中文AI学习资源库：从Python到深度学习的全栈教程

Kimi Chat is Moonshot AI's agentic AI workspace for coding, deep research, and document generation.

面向中文读者的可运行深度学习教科书，每节一个Jupyter笔记本，支持PyTorch、MXNet、TensorFlow和PaddlePaddle四种实现。

JavaGuide：156K+ Star 的开源 Java 面试与后端知识体系，2026 年新增 AI 应用开发与 AI 编程实战指南

OpenAI o1 is the 2024 reasoning model that thinks in chains of thought before answering — now reachable only on ChatGPT Plus and Pro under Legacy models, or

Agentic AI research workspace with real-time collaborative LaTeX, Typst, and Markdown writing.

Collaborative AI agent on its own cloud computer that builds apps, decks, docs, and designs with you while you watch and steer.

Build a GPT-style LLM from scratch with hands-on PyTorch code in this acclaimed book by Sebastian Raschka

免费开源中文AI工程课程：523节课横跨20个阶段，从线性代数手写算法到自主Agent

A visual, code-first O'Reilly guide to building and refining large language models.

Open-source enterprise AI chat with permission-aware search across your internal knowledge

Anthropic's free Claude learning hub — tutorials, structured paths, skill assessments and a marketplace of pre-built Claude skills.

Free bite-sized AI and data science threads for fast, no-signup learning on Threads

Silico is Goodfire's interpretability agent for understanding, debugging, and controlling the internals of your AI models

Wolfram|Alpha answers computable questions with verified results computed from curated data and the Wolfram Language.

Free AI-powered research tool for searching 238 million scientific papers, with TLDR summaries and citation graphs.

Open-access research platform for building, training, and reproducing world model and self-supervised learning experiments.

Deconstructor is a free interactive etymology visualizer that turns word analysis into an editable graph.

Free AI-assisted search, chat, and structured PDF reports over open-access PubMed biomedical literature, no registration needed.

Free Chrome extension that summarizes, chats, and researches any web page by voice or text.

Search and read 81,735 modern Chinese poems free — an open-access modern Chinese poetry corpus for research and reading.

Proactive AI second brain that auto-organizes saved content into guided learning flows.

Free, MIT-licensed local AI co-scientist that runs 326 scientific workflows on your own API keys.

Free, no-registration deep search for public info on people and topics.

Free Stanford research prototype that turns a topic into a cited, Wikipedia-style report through simulated expert–learner AI dialogue.

Paper Notes turns 25,000+ AI conference papers into free 5-minute summaries, sorted by conference and subfield.

Genspark is an AI search workspace that turns cited Sparkpage research into slides, sheets, dashboards, and no-code agents.

AI co-researcher that runs deep literature search, follows citation trails, and surfaces the papers keyword search misses.