Library
Design
- Are.na Ad-free platform for collecting and connecting references into channels.
- Awwwards Juried web design gallery scored on design, usability, creativity and content.
- Cosmos Visual moodboard and collection tool for designers.
- Godly Hand-curated web design gallery with animated previews of motion and interaction.
- Minimal Gallery Curated minimalist website examples by category.
- Mobbin Library of real app screens and flows for UI pattern reference.
- One Page Love Gallery of single-page websites since 2008, plus templates.
- Realtime Colors Preview a color palette and fonts on a live sample site; exports CSS/Tailwind.
- Refero Searchable reference library of real web/app UI screens and flows.
- Siteinspire Curated web design showcase filterable by style, type and subject.
- Typewolf Font pairings and type-in-use examples from real sites.
- Utopia Fluid type and space scale calculators based on clamp().
Code & Frontend
- Animista Playground of ready-made CSS animations with tweakable timing and keyframe export.
- Codrops Web design and development tutorials and experimental demos (including Playground).
- CSS Gradient Visual linear/radial gradient builder with CSS output.
- CSS Loaders 600+ single-element pure CSS loading animations, copy-ready (Temani Afif).
- CSS Pattern Pure CSS background patterns built from gradients (Temani Afif).
- CSS Shape Collection of pure CSS shapes with copy-ready code (Temani Afif).
- CSS Tip Short modern-CSS tips and tricks with demos (Temani Afif).
- Easings.net Cheat sheet of standard easing functions with CSS and JS values.
- fffuel Collection of SVG generators for backgrounds, gradients, noise and patterns.
- Uiverse Community library of open-source UI elements (buttons, loaders, toggles) in CSS/Tailwind.
AI Engineering
- Anthropic Skills Anthropic's first-party Agent Skills, including document skills (pdf, docx, xlsx, pptx) and examples.
- Bifrost Go AI gateway focused on low overhead; OpenAI-compatible API over many providers, plus an MCP gateway.
- Claude Code Router Proxy that routes Claude Code requests to other models (DeepSeek, Gemini, Ollama, OpenRouter) per task type.
- Context7 MCP server that injects current, version-specific library docs into the agent's context to cut hallucinated APIs.
- Everything Claude Code (ECC) Large collection of agents, skills, rules, hooks and memory setup for Claude Code, Cursor, Codex and OpenCode.
- Headroom Reversible context compression layer for agents (tool output, logs, RAG chunks, code); library, OpenAI-compatible proxy, agent wrapper, or MCP server.
- Impeccable Design skill for AI coding agents: typography, color, spacing, motion references plus commands and detector rules against generic AI-looking UI.
- LiteLLM Python SDK and proxy for 100+ providers behind an OpenAI-compatible API, with fallbacks, budgets and virtual keys.
- LLMLingua Microsoft Research prompt compression: a small LM scores tokens and drops low-information ones (EMNLP 2023 family).
- OmniRoute Self-hosted AI gateway: one OpenAI-compatible endpoint over many providers, quota-aware fallback and built-in token compression.
- Portkey AI Gateway Open-source gateway paired with a hosted observability and governance platform.
- Repomix Packs a repository into one AI-friendly file with token counts, git-aware filtering and Tree-sitter compression.
- RTK (Rust Token Killer) Single-binary CLI proxy that compresses shell command output (git, npm, cargo, ls...) before it enters a coding agent's context.
- Superpowers Development methodology as composable skills: brainstorm, plan, execute, TDD and root-cause debugging for coding agents.
Data Visualization
- D3 Low-level toolkit for bespoke data-driven visualizations; Plot is built on it.
- Mosaic UW IDL framework that runs Plot-style linked views over millions of rows by pushing computation to DuckDB.
- Observable Plot Concise JavaScript library for exploratory charts built on layered marks and scales.
- The Pudding Visual essays that explain ideas through data and interactive graphics.
- Vega-Lite Declarative JSON grammar of interactive graphics with selections for linked views.
Learning & Thinking
- Explorable Explanations Curated hub of interactive explainers, tools and talks on learning through play.
- Ink & Switch Independent research lab publishing long-form essays on local-first software and tools for thought.
- Red Blob Games Interactive explanations of algorithms and math (pathfinding, hex grids, noise).
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