A set of small, composable agent skills for software engineering workflows, taken from the author's own .agents directory.
A collection of Chinese-language circumvention tools, bundled Chrome/Firefox proxy packs, and setup tutorials for V2Ray, Shadowsocks, and related clients.
A curated list of free system design learning materials and interview preparation problems and concepts.
A curated Chinese-language handbook of ways to earn side income with AI, covering tools, platforms, and content strategies.
A free Chinese-language 100-day Python course, from basics to advanced topics, with lessons and code examples.
Embedded analytical SQL database engine that runs in-process, with clients for Python, R, Java, Rust, Go, and Wasm.
A collection of 70 cybersecurity projects with source code, certification roadmaps, and learning resources, organized from foundations to advanced.
A large curated guide covering self-hosting tools, hardware, and setup walkthroughs for running software on your own servers.
A free 9-week course teaching data engineering by building an end-to-end data pipeline using tools like Docker, Terraform, Kafka, Spark, and dbt.
Python and Jupyter reproductions of quant strategies from Chinese brokerage research reports, covering A-share timing, factors, value and portfolio optimization.
Collection of ready-to-run vulnerable Docker Compose environments for security research, learning, and demonstration.
Android app for studying Anki spaced-repetition flashcards, an official port of the Anki system.
Sample Android TODO app showing different architecture patterns, implemented across branches with Jetpack Compose, ViewModels, Room, and Hilt.
A free, cohort-based course teaching ML engineering: training models, exposing them via APIs, and deploying with Docker, Kubernetes, and AWS Lambda.
A Chinese-language, systematic Vibe Coding tutorial that takes beginners from idea to full-stack product using AI-assisted programming.
Official documentation site with tutorials and how-to guides for using the Nix package manager and NixOS.
A collection of Hello World programs in over a thousand programming and markup languages, organized as a reference list.
Reference Android app built entirely in Kotlin and Jetpack Compose that delivers Now in Android news and content updates.
A Minecraft tech modpack built around GregTech Modern, with custom machines, magic mods like Botania, and the GTOCore add-on.
Jupyter notebooks and code samples accompanying Wes McKinney's book on data analysis with Python, pandas, and NumPy.
A collection of JSON samples for customizing column, view, and form formatting in SharePoint and Microsoft Lists.
Open-source desktop app that recognizes sheet music from PDFs or images into editable scores, then exports MusicXML/MIDI and offers guided practice.
A curated guide collecting tips, tricks, and reference material for learning and using Vim.
A collection of interactive R courses that run inside the swirl R package, covering programming, regression, data cleaning, and inference.
A video course with Jupyter notebooks that builds neural networks and backpropagation from scratch, from basics to Transformer language models.