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Bootstrap
Open SourceUI Libraries · Frontend
The classic CSS framework with components, grid and utilities.
cssbootstrapcomponents
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UI Libraries · Frontend
The classic CSS framework with components, grid and utilities.
E2E & Browser · Testing
Test on real browsers and devices in the cloud.
API Clients · API Tools
Fast, Git-friendly open-source API client that stores collections locally.
Error Tracking · Monitoring & Observability
Error monitoring with strong mobile and release health support.
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.
Programming Languages
Official C# documentation from Microsoft.
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.
Cross-Platform · Mobile Development
Run web apps natively on iOS, Android and the web.
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.
Vector Databases · AI for Developers
Open-source embedding database designed for local-first AI apps.
Visual Regression · Testing
Visual regression and UI review built by the Storybook team.
CI/CD · DevOps
Cloud CI/CD platform with strong caching and parallelism.
Models & LLM APIs · AI for Developers
Anthropic's AI assistant, strong at coding, analysis and long context.
AI Coding Assistants · AI for Developers
Anthropic's agentic coding tool that lives in your terminal.