Free
Load & Performance · Testing
Google's Core Web Vitals and page speed analysis service.
performancecore-web-vitalsgoogle
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Load & Performance · Testing
Google's Core Web Vitals and page speed analysis service.
Color Tools
Advanced color scheme designer based on color theory.
Notebooks & Data Science · Data & Analytics
The foundational Python library for dataframes and analysis.
Documentation Generators · PDF & Documents
Universal document converter: Markdown to PDF, DOCX, HTML and more.
UI Libraries · Frontend
Beautifully styled components on top of Ark UI and Panda CSS, copy-paste across React, Vue and Solid.
PDF Tools · PDF & Documents
Large free PDF toolbox, no registration required.
Courses & Tutorials · Documentation & Learning
Blog tutorial open-source berbahasa Indonesia — Linux, Python, JavaScript dan dasar pemrograman, gratis selamanya.
Stock & Placeholders · Image & Media
Free stock photos and videos with an API.
GUI Clients · Database
The most popular open-source administration GUI for PostgreSQL.
Relational · Database
Open-source vector similarity search extension for PostgreSQL.
Frameworks · Backend
Productive Elixir web framework with realtime channels.
Icons · Frontend
Flexible icon family with six weights across 9,000+ icons.
Design Tools · Design & Prototyping
Free browser-based Photoshop alternative that opens PSD files.
Programming Languages
Official PHP website with language documentation and downloads.
Ecosystem · CSS Tools
Minimal classless CSS framework — semantic HTML instantly looks clean and responsive.
Stock & Placeholders · Image & Media
Easy-to-use placeholder images from Unsplash via URL parameters.
Stock & Placeholders · Image & Media
Massive library of free images, videos, vectors and audio under the Pixabay license — no attribution required.
Stock & Placeholders · Image & Media
Fast, flexible placeholder image service with a simple URL API.
Ecosystem · CSS Tools
Official Tailwind CSS playground for trying classes in the browser.
Containers · DevOps
Free in-browser Docker playground for experiments.
Package Managers · Development Environment
Fast, disk-efficient JavaScript package manager with strict dependencies.
Serverless & BaaS · Database
Open-source backend in one file: SQLite database, auth, realtime and files.
Containers · DevOps
Daemonless, rootless container engine, Docker-compatible CLI.
Notebooks & Data Science · Data & Analytics
Blazing-fast Rust-based dataframe library for Python and Rust.