UML model and code examples of GoF patterns in Crystal

In plain words

This repository contains UML models and code examples of Gang of Four design patterns implemented in the Crystal programming language. It serves developers learning design patterns or working with Crystal who need concrete reference implementations. The resource stands out by providing visual UML diagrams alongside working code examples, making it easier to understand pattern structure and application in Crystal specifically.

written from the facts on this page · September 2026

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  UML Diagram for GoF Design Pattern Examples Written in TypeScript2021 · github.com · ▲6

  UML diagram list of GoF design pattern examples written in Typescript. - takaakit/uml-diagram-for-typescript-design-pattern-examples

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  The Pattern Library2014 · thepatternlibrary.com · ▲307

  Free to use patterns by awesome designers

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  Globe visualizations in Golang2017 · github.com · ▲258

  Globe wireframe visualizations in Golang. Contribute to mmcloughlin/globe development by creating an account on GitHub.

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  Programmatically Generate Diagrams for GitHub Readmes2019 · github.com · ▲220

  🧜‍♀️ RESTful rendering pipeline for generating sequence and UML diagrams using Mermaid for Markdown docs (Diagrams as a Service) - Schachte/Mermrender

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  Gleek diagram maker – UML class, Sequence, ER diagrams, Flowcharts2021 · gleek.io · ▲56

  Create diagrams without touching your mouse. Generate informal, class, sequence, state, gantt, user journey or entity-relationship diagrams using only the keyboard.

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  Design.MDApr 2026 · getdesign.md · ▲111

  Feels a bit like Figma, but for coding agents. Instead of going back and forth with prompts, you give the agent a DESIGN.md that defines the design system up front, and it generally sticks to it when generating UI. Google Stitch seems to be moving in this direction as a standard, so we put together a small collection of DESIGN.md files based on popular web sites.

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  Run full iOS 16.5 firmware on Android Devices▲528

  Contribute to oosexgang/hackios-xnu-kernel development by creating an account on GitHub.

  Dev tools · 2d ago · github.com

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  /dev/null▲492

  a social network for devs

  Dev tools · 5d ago · dev-null.sh

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  Reladraw – A diagram language where you decide where to place things▲411

  Contribute to reladraw/reladraw development by creating an account on GitHub.

  Dev tools · 28d ago · github.com

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  OpenBot▲362

  Grok Bot alternative: free, local, open-source, multiplayer

  Dev tools · 25d ago · openbot.run

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  Talanoa▲346

  Hi HN, I’m a fullstack developer, and honestly, I’ve lost count of how many side projects I’ve worked on over the years. But one idea kept coming back to me: a different kind of email client. It first came to me in 2014: “What if we could handle emails more like conversations?” Every year, I’d revisit this concept in my “Build Notes.” Ten years later, no one had built exactly what I had in mind — so I finally decided to do it myself. That’s how Talanoa was born. I wanted something focused on people, not timelines. I was tired of marking messages as unread just to remember to reply later, or…

  Dev tools · 23d ago · talanoa.email

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  AUDR by Chargebee▲323

  Open standard for tracking agent run costs

  Dev tools · 27d ago · openaudr.dev

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  Lofi.cafe▲1,192

  Lofi music streams for studying, working, and relaxing.

  Life & fun · 2021 · lofi.cafe

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  Mighty▲931

  Make Chrome faster and use 10x less memory

  Work · 2021 · playgroundai.com

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  FigJam by Figma▲864

  An online whiteboard from Figma designed for teams

  Work · 2021 · figma.com

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  Butter▲848

  All-in-one tool for the smoothest virtual workshops 🧈

  Work · 2021

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  Landing Page Checklist▲809

  Build your landing page with these 100+ tools

  Growth · 2021 · landingpage.fyi

• PF
  PDFs from HTML▲742

  Life & fun · 2021 · pdf.math.dev