Free
Tremor
Open SourceData Viz & Charts · Frontend
React components and blocks built for dashboards — charts, KPI cards and grids on Tailwind.
chartsdashboardsreacttailwind
Browse the complete directory — use filters to narrow down.
Data Viz & Charts · Frontend
React components and blocks built for dashboards — charts, KPI cards and grids on Tailwind.
Dependency Security · Security
All-in-one open-source vulnerability and misconfiguration scanner.
API Protocols · Backend
End-to-end typesafe APIs without schemas or code generation.
Secret Scanning · Security
Open-source tool to find, verify and monitor leaked credentials.
Penetration Testing · Security
Guided, browser-based cybersecurity training with hands-on labs from beginner to offensive paths.
Build & Lint · Frontend
High-performance build system and cache for JavaScript monorepos.
Serverless & BaaS · Database
Distributed SQLite-based database for edge and local-first apps.
Typography & Fonts · Design & Prototyping
Visual type-scale calculator — pick a ratio and base size, preview the resulting hierarchy live.
ORMs · Backend
Mature decorator-based ORM for TypeScript and JavaScript.
Programming Languages
Typed JavaScript at scale. Official docs, playground and handbook.
Search Engines · Database
Open-source, in-memory search engine focused on developer experience.
Typography & Fonts · Design & Prototyping
Curated font recommendations and pairing guides with real-website examples for every family.
Documentation Generators · PDF & Documents
Modern, fast typesetting system — a fresh alternative to LaTeX.
Color Tools
Generate Tailwind CSS color scales from any base color.
Web Analytics · Monitoring & Observability
Simple, self-hostable web analytics you own (trending).
Design Tools · Design & Prototyping
Free open-source SVG illustrations with a live color picker.
Converters · Encoding & Decoding
Browse and search all Unicode characters by block and codepoint.
Game Engines · Game Development
The most widely used game engine for mobile, AR/VR and indie titles, with a massive asset ecosystem.
Feature Flags · DevOps
Open-source feature flag platform you can self-host — strategies, gradual rollouts and an activation dashboard.
Ecosystem · CSS Tools
Instant on-demand atomic CSS engine with full customization.
Game Engines · Game Development
AAA-grade game engine known for high-fidelity 3D graphics, Blueprints visual scripting and C++ workflows.
Stock & Placeholders · Image & Media
High-quality free stock photos with a developer API.
Design Tools · Design & Prototyping
The largest Figma UI kit and React library — 10k+ components and variants in a clean, modern style.
Compression & Optimization · Image & Media
Free, open-source AI image upscaler for desktop — batch-enlarge images locally with Real-ESRGAN models.