Free
Headers & CSP · Security
Scan any site's HTTP security response headers and get a grade.
headershstscspaudit
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Headers & CSP · Security
Scan any site's HTTP security response headers and get a grade.
PDF Tools · PDF & Documents
PDF toolkit focused on editing text and content in place.
E2E & Browser · Testing
The long-standing browser automation suite with broad language support.
Cheatsheets & Learning · Git & Version Control
The SemVer specification for meaningful version numbers.
Dependency Security · Security
Fast static analysis for finding bugs and vulnerabilities in code.
ORMs · Backend
Promise-based Node.js ORM for Postgres, MySQL, MariaDB and SQLite.
UI Libraries · Frontend
The shadcn/ui philosophy ported to Svelte: copy-paste components you own, built on Melt UI.
UI Libraries · Frontend
Copy-and-paste React components built on Radix and Tailwind.
Screenshots · Image & Media
Powerful open-source screenshot and screen recording tool for Windows.
Hosting & Collaboration · Git & Version Control
The badge service for READMEs — build status, version, downloads and custom badges as compact SVGs.
Full-stack Boilerplates · Project Starters
Marc Lou's opinionated Next.js SaaS boilerplate — SEO, auth, Stripe, emails and deployment pre-wired for shipping in days.
Design Systems · Design & Prototyping
Shopify's design system with components, tokens and guidance.
Screenshots · Image & Media
Beautiful product screenshots in seconds — device mockups, backgrounds and annotations in the browser.
Queues & Streaming · Database
Ruby's most popular background job processor — simple, efficient and backed by Redis.
APM & Tracing · Monitoring & Observability
Open-source Datadog alternative built on OpenTelemetry.
Icons · Frontend
Free SVG brand icons for popular products and companies.
UI Libraries · Frontend
Adaptive design system for Svelte and React on Tailwind, with themes and accessible components.
Design Tools · Design & Prototyping
Mac-native design toolkit with strong vector editing.
Stock & Placeholders · Image & Media
The largest platform to publish, share and download 3D models with an embeddable WebGL viewer.
PDF Tools · PDF & Documents
Simple online PDF tools with a clean interface.
Dependency Security · Security
Find and fix vulnerabilities in dependencies, containers and code.
API Testing · API Tools
API testing tool specialized in SOAP and REST services.
Dependency Security · Security
Detect supply-chain attacks and malicious changes in npm and PyPI packages.
API Protocols · Backend
Reliable bidirectional realtime communication over WebSockets.