freeCodeCamp.org's open-source codebase and curriculum. Learn to code for free.

Interactive roadmaps, guides and other educational content to help developers grow in their careers.

💯 Curated coding interview preparation materials for busy software engineers

Virtual whiteboard for sketching hand-drawn like diagrams

The open and composable observability and data visualization platform. Visualize metrics, logs, and traces from multiple sources like Prometheus, Loki, Elasticsearch, InfluxDB, Postgres and many mo…

Apache ECharts is a powerful, interactive charting and data visualization library for browser

A terminal built on web technologies

Visual primitives for the component age. Use the best bits of ES6 and CSS to style your apps without stress 💅

Actor-based state management & orchestration for complex app logic.

人人都能用英语

Redis Node.js client

Sass makes CSS fun!

Highcharts JS, the JavaScript charting framework

NG-ZORRO admin panel front-end framework (surge mirror https://ng-alain-doc.surge.sh)

Authenticator generates 2-Step Verification codes in your browser.

ZUI is an HTML5 front UI framework.

Modal window effects with transitions CSS3.