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✶

The Odin Project

Learning Resources

A free, open-source full-stack curriculum that takes beginners from zero to job-ready web developers.

open-sourceweb
TutorialFreeCSS
✶

freeCodeCamp

Learning Resources

A free, self-paced coding curriculum covering web development, data science, and machine learning with certifications.

freeweb
TutorialCSSFree
✚

Frontend Checklist

Developer Resources

An exhaustive checklist of everything a frontend developer should verify before shipping a website.

open-sourceweb
CSSCheatsheetFree
✚

HTTP Status Codes

Developer Resources

A plain-language reference for every HTTP status code, from 200 to 599, with quick explanations.

freeweb
BackendDocumentationFree
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✚

Can I Use

Developer Resources

Up-to-date browser support tables for HTML, CSS, and JavaScript features, essential for cross-browser work.

freeweb
CSSBrowserFree
✚

Regex101

Developer Resources

An interactive regex tester with real-time highlighting, explanation, and a library of community patterns.

freeweb
BackendCheatsheetFree
✚

OverAPI

Developer Resources

An enormous index of programming cheatsheets gathered from across the web into one searchable page.

freeweb
CheatsheetFreeBackend
✚

OWASP

Developer Resources

The open-source foundation's guides and checklists for building and securing software against common attacks.

freeweb
DocumentationBackendFree
✚

web.dev

Developer Resources

Google's hub for web development guidance, with practical guides, performance audits, and learning paths.

freeweb
DocumentationTutorialCSS
✚

DevDocs

Developer Resources

A fast, offline-friendly documentation browser that aggregates API docs for hundreds of languages and tools.

freeweb
DocumentationFreeBackend
▣

Flowbite

Templates

A Tailwind CSS component library with interactive UI components and a helpful set of blocks and templates.

freemiumweb
CSSUI KitDesign
▣

HTML5 UP

Templates

A collection of free, responsive HTML5 and CSS3 website templates you can download and customize.

freeweb
CSSFree
▣

Bootstrap

Templates

The world's most used CSS framework, providing responsive grid systems, components, and utility styles.

open-sourceweb
CSSUI KitFree
♥

Geometry Dash

Games

A rhythm-based platformer where you jump through geometric obstacle courses synced to music.

paidmobile
GamesAudioPremium
⬡

Swagger UI

APIs

The open-source tool that turns OpenAPI specs into interactive, self-documenting API pages.

open-sourceweb
APIBackendDocumentation
⬡

Insomnia

APIs

A desktop API client for designing, testing, and debugging REST and GraphQL APIs with a clean UI.

freemiumcross-platform
APIBackendPremium
⬡

Hoppscotch

APIs

A lightweight, open-source API testing tool that runs entirely in the browser with a clean workspace.

open-sourceweb
APIBackendOpen Source
⬡

GitHub REST API

APIs

The official API for automating GitHub — repos, issues, PRs, releases, and actions — from your own scripts.

freeweb
APIBackendFree
⬡

Stripe API

APIs

A developer-friendly payments API with clean documentation, libraries for every language, and instant webhooks.

freemiumweb
APIBackendPremium
✦

ColorZilla

Browser Extensions

A browser extension with an eyedropper, color picker, gradient generator, and palette history for web designers.

freeextension
DesignCSSFree
✦

JSON Viewer

Browser Extensions

A browser extension that formats, validates, and syntax-highlights JSON in the browser with collapsible trees.

freeextension
BrowserBackendFree
✦

Wappalyzer

Browser Extensions

A browser extension that instantly reveals the technologies powering any website you visit.

freeextension
BrowserBackendFree
✿

Audacity

Applications

A free, open-source audio editor for recording, editing, and mixing audio with a straightforward workflow.

open-sourcecross-platform
AudioOpen SourceFree
✿

Spotify

Applications

A music streaming service with millions of tracks, smart playlists, and podcast support that follows you across every de…

freemiumcross-platform
AudioPremium
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