Free
Theatre.js
Open SourceAnimation · Frontend
Motion design tool with a visual editor that attaches to JavaScript — keyframe anything on the web.
animationmotion3deditor
Browse the complete directory — use filters to narrow down.
Animation · Frontend
Motion design tool with a visual editor that attaches to JavaScript — keyframe anything on the web.
3D & WebGL · Frontend
The JavaScript 3D library — WebGL scenes, materials, lights and cameras with an enormous ecosystem.
Cheatsheets · Documentation & Learning
Community-maintained, practical examples for every CLI command.
Terminals & Shells · Development Environment
Terminal multiplexer for persistent sessions, panes and windows.
Other Formats · Data Formats
Official TOML language site with spec, docs and editor support.
JSON · Data Formats
Convert JSON into TypeScript, Zod, GraphQL, Kotlin, Go structs and more.
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.
Build & Lint · Frontend
High-performance build system and cache for JavaScript monorepos.
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.
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.
Ecosystem · CSS Tools
Instant on-demand atomic CSS engine with full customization.
Compression & Optimization · Image & Media
Free, open-source AI image upscaler for desktop — batch-enlarge images locally with Real-ESRGAN models.
Uptime & Alerting · Monitoring & Observability
Fancy open-source self-hosted uptime monitoring with status pages.
Converters · Encoding & Decoding
Encode and decode URLs and query strings online.
SQL Tools
In-depth guide to SQL indexing and performance tuning.
Passwords & IDs · Security
Generate UUIDs/GUIDs in bulk, including v4 and v7 versions.
Package Managers · Development Environment
Extremely fast Python package and project manager from Astral.