katex

Fast math typesetting for the web.

The open source embeddable online markdown editor (component).

Multi-framework streaming Markdown renderers for AI apps: Vue/Nuxt, React/Next.js, Svelte, and Angular, with Mermaid, KaTeX, stream-diffs code blocks, safe HTML, and low-jitter updates.

A Markdown-based note-taking app for mobile devices.

A privacy-focused AI chat platform built with Vite + Capacitor + Cloudflare. Runs locally or in the cloud, supports Gemini models, live web search, and intelligent key rotation. No sign-up required — fast, secure, and customizable.

Ubiquité : Open-source Perplexity clone with multi-LLM support and KaTeX math rendering.