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freeCodeCamp.org's open-source codebase and curriculum. Learn math, programming, and computer science for free.

:books: Freely available programming books

Your own personal AI assistant. Any OS. Any Platform. The lobster way. 🦞

Interactive roadmaps, guides and other educational content to help developers grow in their careers.

Learn how to design large-scale systems. Prep for the system design interview. Includes Anki flashcards.

An opinionated list of Python frameworks, libraries, tools, and resources

A list of Free Software network services and web applications which can be hosted on your own servers

Curated list of project-based tutorials

Searchable rich-text notes for techs. One encrypted notepad instead of 80 Notepad tabs: SQLite FTS5 search, SQLCipher protection, images and tables, tear-off .knote sharing. WPF, .NET 4.8.

The 3D engine for Flutter — native flutter_gpu rendering inside the widget tree.

An arbitrage bot is a smart contract connected to an external automation script that controls its operation.

Kigi — The world's first CLI with built-in Graph Engineering (Rust, based on Grok Build open source)

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Compiler Explorer for RTL: synthesize Verilog with Yosys and explore timing paths, logic depth, and fanin/fanout interactively

AVE 是面向安全运营的多源漏洞知识库，统一 AVE 编号并输出结构化 TOML，同时整理和校验公开 PoC/EXP 资产，支持按严重等级快速筛选高价值漏洞。漏洞爬取与梳理的代码和逻辑暂未开源。