Freemium
Error Tracking · Monitoring & Observability
Error monitoring with strong mobile and release health support.
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Error Tracking · Monitoring & Observability
Error monitoring with strong mobile and release health support.
Courses & Tutorials · Documentation & Learning
Kelas online UI/UX dan web development berbahasa Indonesia dengan studi kasus portofolio dan akses selamanya.
Architecture & Patterns · Project Starters
The popular open-source reference architecture for scalable React apps — folder structure, patterns and real conventions.
Queues & Streaming · Database
Robust Redis-backed job queue for Node.js.
Ecosystem · CSS Tools
Flexbox-based CSS framework with no JavaScript — readable class syntax and modular imports.
Frameworks · Backend
All-in-one JavaScript runtime, bundler, test runner and package manager.
Penetration Testing · Security
The industry-standard toolkit for web application security testing: intercepting proxy, scanner and intruder.
Courses & Tutorials · Documentation & Learning
Alex Xu's visual system design courses and newsletter — architecture explained with diagrams, not jargon.
Programming Languages
Comprehensive C language and standard library reference.
Programming Languages
Official C# documentation from Microsoft.
Programming Languages
Comprehensive C++ language and standard library reference.
Web Servers & Proxies · DevOps
Web server with automatic HTTPS and simple configuration.
Scheduling & Booking · API Tools
Open-source scheduling infrastructure — Calendly alternative with booking links, teams and an API you can self-host.
Scheduling & Booking · API Tools
The scheduling standard — shareable booking links, round-robin teams, reminders and integrations.
Learning & Reference · CSS Tools
Browser support tables for HTML, CSS and JavaScript features.
Design Tools · Design & Prototyping
Easy visual design platform for graphics, docs and video.
Cross-Platform · Mobile Development
Run web apps natively on iOS, Android and the web.
Design Systems · Design & Prototyping
IBM's open-source design system for products and experiences.
Text & Diff · Developer Utilities
Create and share beautiful images of your source code.
Queues & Streaming · Database
The classic Python distributed task queue — async jobs, schedules and workflows on RabbitMQ or Redis.
UI Libraries · Frontend
Accessible, themeable React component system with style props.
Data Viz & Charts · Frontend
Simple, canvas-based charting for the web — eight chart types with sensible defaults and plugins.
Models & LLM APIs · AI for Developers
OpenAI's conversational assistant for coding, writing and analysis.
Uptime & Alerting · Monitoring & Observability
Monitoring-as-code using Playwright tests run from the cloud.