Top 23 JavaScript HacktoberFest Projects

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1. axios

   1 507 109,069 9.3 JavaScript

   Promise based HTTP client for the browser and node.js

   

   Project mention: Spine v1: Stop Making Claude Rediscover Your Codebase Every Time You Open a Repo | dev.to | 2026-05-02

   git clone https://github.com/axios/axios.git cd axios

2. SaaSHub

   www.saashub.com featured

   SaaSHub - Software Alternatives and Reviews. SaaSHub helps you find the best software and product alternatives

   

3. Material UI

   2 303 98,388 9.9 JavaScript

   Ready-to-use foundational React components, free forever. It includes Material UI, which implements Google's Material Design.

   

   Project mention: Show HN: Typique – a bundler-independent, zero-runtime CSS-in-TS library | news.ycombinator.com | 2026-01-07

   Hi HN! I’ve been following zero-runtime CSS-in-JS/TS libraries for a while and noticed that most of them end up overwhelmed by bundler compatibility issues. A good summary of these problems is in the final status report [1] of Pigment CSS — MUI’s attempt in this space.

   As someone working on TypeScript tooling, I started wondering whether this problem could be approached from a different angle: instead of relying on bundler plugins, use TypeScript types to define styles, and TypeScript tooling to provide locally scoped class and CSS variable names.

   This led to Typique — a library built as a TypeScript plugin. It provides IDE integration (completion, diagnostics, quick fixes) and emits plain CSS without any dependence on bundler or framework. It’s early, but already usable; I’ve been using it in a couple of personal projects.

   Feedback, questions, and skepticism are very welcome. Thanks for reading.

   [1] https://github.com/mui/material-ui/issues/45759#issuecomment...

4. 33-js-concepts

   3 39 66,458 9.5 JavaScript

   📜 33 JavaScript concepts every developer should know.

   

   Project mention: 33-js-concepts VS javascript - a user suggested alternative | libhunt.com/r/33-js-concepts | 2026-01-15

5. Meteor JS

   4 78 44,773 9.9 JavaScript

   Meteor, the JavaScript App Platform

   

   Project mention: Blaze 3 Unofficial Simple Todos Tutorial with Meteor 3.4.1 + Rspack + PicoCSS | dev.to | 2026-05-08

6. remote-jobs

   5 49 40,460 9.2 JavaScript

   Source for remoteintech.company — a community-maintained directory of remote-friendly tech companies

   

   Project mention: Show HN: Curated list of 500 tech companies hiring remote | news.ycombinator.com | 2025-07-21

7. ToolJet

   6 193 38,008 10.0 JavaScript

   ToolJet is the open-source foundation of ToolJet AI - the enterprise app generation platform for building internal tools, dashboard, business applications, workflows and AI agents 🚀

   

   Project mention: Open Source Retool Alternative: A Code-First, AI-Native Approach | dev.to | 2026-04-28

   ToolJet: github.com/ToolJet/ToolJet

8. marked

   7 74 36,868 9.2 JavaScript

   A markdown parser and compiler. Built for speed.

   

   Project mention: Angular’s New injectAsync() API Explained | dev.to | 2026-05-08

   In our demo application, we're using highlight.js and Marked for markdown processing and syntax highlighting.

9. fastify

   8 127 36,453 9.5 JavaScript

   Fast and low overhead web framework, for Node.js

   

10. hackathon-starter

    9 26 35,220 9.4 JavaScript

    A boilerplate for Node.js web applications

    

    Project mention: PR-05 at Hacktoberfest: Optimizing HERE Maps E2E Tests and Handling PR Feedback | dev.to | 2025-10-26

    Pull Request #1457

11. JavaScript

    10 18 34,186 3.5 JavaScript

    Algorithms and Data Structures implemented in JavaScript for beginners, following best practices. (by TheAlgorithms)

    

12. jsPDF

    11 40 31,220 8.1 JavaScript

    Client-side JavaScript PDF generation for everyone.

    

    Project mention: Document Generation for Developers: Security, Compliance, and Build-vs-Buy Decisions for the Template-Plus-Data Pipeline | dev.to | 2026-05-29

    The DIY path uses open-source libraries. python-docxtpl renders Word templates in Python using Jinja2 syntax, covering scalar substitution and table loops at no licensing cost. jsPDF lets you construct PDFs in Node.js from scratch via code. Both give you complete control over rendering logic, and neither comes with a licensing fee. The cost is that your team owns maintenance, scaling infrastructure, and all compliance certification work. When your open-source rendering library has a memory leak under high concurrency, or when your auditor asks for your SOC 2 report, you answer those questions directly.

13. webtorrent

    12 86 30,976 7.2 JavaScript

    ⚡️ Streaming torrent client for the web

    

    Project mention: Ask HN: Streaming a Bittorent Video from a Webpage? | news.ycombinator.com | 2025-11-29

    WebTorrent works on the browser but I'm not sure if this is what you're asking for

    https://webtorrent.io/

14. swagger-ui

    13 172 28,837 9.1 JavaScript

    Swagger UI is a collection of HTML, JavaScript, and CSS assets that dynamically generate beautiful documentation from a Swagger-compliant API.

    

    Project mention: Publishing OAS-Based API Doc on GitHub Pages | dev.to | 2026-03-15

    Most of the content is the same as what is written here.

15. nginxconfig.io

    14 5 28,288 5.7 JavaScript

    ⚙️ NGINX config generator on steroids 💉

    

16. shields

    15 143 26,738 9.7 JavaScript

    Concise, consistent, and legible badges in SVG and raster format

    

    Project mention: How to Write a Good README: Your Project's Most Important File [2026 Guide] | dev.to | 2026-05-01

    Badges. Those little colored shields at the top of a README — build passing, coverage percentage, npm version, license type — aren't decoration. According to shields.io, which powers most of them, badges provide live, at-a-glance information about a project's health. A green "build passing" badge tells me this project has CI. A coverage badge tells me someone cares about testing. I've worked on teams where the presence or absence of badges was literally part of the library evaluation checklist.

17. Nodemon.io

    16 153 26,685 7.9 JavaScript

    Monitor for any changes in your node.js application and automatically restart the server - perfect for development

    

    Project mention: 31 npm packages you can replace with Node.js APIs | dev.to | 2025-09-02

    27. nodemon (7.8M weekly downloads)

18. select2

    17 31 25,916 8.1 JavaScript

    Select2 is a jQuery based replacement for select boxes. It supports searching, remote data sets, and infinite scrolling of results.

    

    Project mention: Select2 – The jQuery replacement for select boxes | news.ycombinator.com | 2025-12-25

19. Modernizr

    18 6 25,665 6.0 JavaScript

    Modernizr is a JavaScript library that detects HTML5 and CSS3 features in the user’s browser.

    

20. Highlight.js

    19 91 24,931 7.2 JavaScript

    JavaScript syntax highlighter with language auto-detection and zero dependencies.

    

    Project mention: Angular’s New injectAsync() API Explained | dev.to | 2026-05-08

    In our demo application, we're using highlight.js and Marked for markdown processing and syntax highlighting.

21. validator.js

    20 34 23,744 7.3 JavaScript

    String validation

    

    Project mention: validatorgo v1.0.0 is here 🎉 — the validator.js you've been missing in Go | dev.to | 2026-05-12

    The library that inspired it: validator.js If you build something with it, I'd genuinely like to hear about it. Drop a comment or tag me on GitHub.

22. GDevelop

    21 154 23,689 9.9 JavaScript

    🎮 Open-source, cross-platform 2D/3D/multiplayer game engine designed for everyone.

    

23. cli

    22 207 23,390 8.9 JavaScript

    Command-line tool to customize Spotify client. Supports Windows, macOS, and Linux. (by spicetify)

    

24. whatsapp-web.js

    23 29 22,009 9.1 JavaScript

    A WhatsApp client library for NodeJS that connects through the WhatsApp Web browser app

    

    Project mention: AI bots spam GitHub repo with identical PRs | news.ycombinator.com | 2026-03-11

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• A note from our sponsor - SaaSHub
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