freeCodeCamp.org's open-source codebase and curriculum. Learn math, programming, and computer science for free.

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

Generation of diagrams like flowcharts or sequence diagrams from text in a similar manner as markdown

A powerful cross-platform UI toolkit for building native-quality iOS, Android, and Progressive Web Apps with HTML, CSS, and JavaScript.

Interactive Data Visualization in the browser, from Python

A terminal emulator for the 21st century.

JavaScript drag and drop, resizing and multi-touch gestures with inertia and snapping for modern browsers (and also IE9+)

Highcharts JS, the JavaScript charting framework

AI agent toolkit: coding agent CLI, unified LLM API, TUI & web UI libraries, Slack bot, vLLM pods

Run code interactively, inspect data, and plot. All the power of Jupyter kernels, inside your favorite text editor.

This is the template I use to start new full-stack projects.

Playwright for chrome extensions