cdnjs is a free, open-source content delivery network that hosts the static assets (JS, CSS, fonts, etc.) of thousands of popular web libraries, letting developers include them via a public CDN URL. This particular repository is the robot-only asset store; library metadata and contributions live in separate repos.

Milligram is an ultra-lightweight (~2kb gzipped) CSS framework that provides minimal default styling for typography, forms, buttons, grids, and tables. It aims to be a clean, low-opinion starting point rather than a full UI component library.

A curated "awesome" list cataloging CSS frameworks, organized into categories like classless, lightweight, general-purpose, material design, utility-based, and specialized/retro themes. It's a reference index rather than a code library, helping developers discover and compare frameworks for styling web projects.

A UI kit that layers Google's Material Design styling on top of Bootstrap 4, providing a large library of pre-built components, animations, icons, and templates. This jQuery-based version is the legacy v4 release, with the project now steering users toward a Bootstrap 5 successor.

neutralinojs is an open-source C++ project in the frameworks space with 8.5k GitHub stars. The repository is actively maintained, with recent commits.

metroui is an open-source JavaScript project in the ui components space with 7.1k GitHub stars. The repository has seen commits within the last year.

Charts.css is a dependency-free CSS framework for data visualization that turns semantic HTML tables into charts and graphs using utility classes and CSS variables. Instead of JavaScript or SVG/canvas rendering, it styles markup directly so charts are accessible, lightweight, and customizable with plain CSS.

Windi CSS is a utility-first CSS framework that generates styles on demand by scanning your HTML/CSS, offering Tailwind-compatible utilities with faster build times and HMR. The project has been officially sunset and is no longer recommended for new projects.

nexe is an open-source TypeScript project in the build tools space with 13.6k GitHub stars. The repository has seen commits within the last year.

An organized, open-source collection of system design learning resources and interview prep, covering scalability concepts (caching, load balancing, databases, CAP theorem) with sample solutions, diagrams, and Anki flashcards. It's a curated study guide rather than a code library.

A curated collection of ready-to-use DESIGN.md files — plain-markdown design system documents reverse-engineered from real companies' websites — that AI coding agents read to generate UI consistent with a given brand's visual language. Each entry analyzes a brand's color, typography, and layout patterns into a drop-in markdown spec.

A wildly popular educational repository that explains software architecture and system design concepts using visual diagrams and plain-language explanations. It covers API/web development, real-world engineering case studies from companies like Netflix and Uber, databases, messaging, and AI/ML fundamentals, aimed at interview prep and general understanding.

system-design is an open-source project in the databases & orm space with 44k GitHub stars. The repository has seen commits within the last year.

A community-maintained archive documenting the leaked and extracted system prompts of major commercial AI chatbots and coding agents — Claude, ChatGPT, Gemini, Grok, Perplexity, Copilot and others — organized by vendor, model version, tool, and persona, often with diffs between releases.

Minds Platform (Minds-Cowork) is an open-source, general-purpose AI agent application aimed at knowledge workers, packaged as a web/desktop (Electron) app that automates multi-step read-and-write tasks and lets users build internal AI tools without engineering. It emphasizes self-hosted control with deployment across cloud, VPC, on-prem, and air-gapped environments.

A curated, link-based collection of free resources for learning system design and preparing for system design interviews, organized by core concepts, architectural patterns, tradeoffs, and worked interview problems with engineering blog references.

seaweedfs is an open-source Go project with 32.9k GitHub stars. The repository is actively maintained, with recent commits.

A large, curated collection of system design learning resources — real-world company case studies, fundamentals, interview prep, AI engineering notes, and software white papers — organized as a linked index pointing to deep-dive articles and a companion newsletter.

Haystack is an open-source Python framework for orchestrating LLM applications through modular, traceable pipelines and agent workflows. It gives explicit control over retrieval, routing, memory, and generation to build RAG systems, semantic search, and autonomous agents that are model- and vendor-agnostic.

OpenViking is an open-source Python project in the agent frameworks space with 25.5k GitHub stars. The repository is actively maintained, with recent commits.