Mustard

Mustard Notes (@mustardnotes.com)

I'm a firefox & chrome browser extension that lets you put notes on any website AND have your bluesky/GitHub followers see them! chrome.mustardnotes.com firefox.mustardnotes.com (still in development and a hobby project so expect some rough edges 🙃)

Margin - Chrome Web Store

Annotate and highlight any webpage, with your notes saved to the decentralized AT Protocol.

Margin - Chrome Web Store

Annotate and highlight any webpage, with your notes saved to the decentralized AT Protocol.

Margin - Chrome Web Store

Annotate and highlight any webpage, with your notes saved to the decentralized AT Protocol.

Mustard-Notes – Get this Extension for 🦊 Firefox (en-US)

Download Mustard-Notes for Firefox. Add your own mustard (notes) to any page — from the German 'seinen Senf dazugeben' (add your opinion). Supports markdown, can publish to your atproto(bluesky)/GitHub followers (never share sensitive data). Opinions, fact checks, gifs — go wild :)

janzheng/sidenote

Chrome extension that helps you analyze and summarize web content

Bluenotes

Bluesky with Community Notes. This a fully-featured clone of the main Bluesky frontend, but with Community Notes!

Hyperdraft

Turn your text notes into a website.

GitHub issues for notes

GitHub issues is almost the best notebook in the world. Free and unlimited, for both public and private notes. Comprehensive Markdown support, including syntax highlighting for almost any language. Plus …

florianschepp/bsky-comments

A zero-dependency Web Component to embed Bluesky discussion threads on any website.

matteomarjanovic/juttu

A Bluesky-based commenting tool for websites.

Home - Margin

Annotate the web

Jared Goering on Twitter / X

Saw this and immediately built it. Open-sourced the whole thing:Ingest URLs, PDFs, tweets, images → LLM compiles a linked markdown wiki → Q&A with citations, knowledge graph, contradiction linting, auto-research, export to HTML/PDF/slides.Been using it nonstop as a personal… https://t.co/ypaXlEA7pn pic.twitter.com/8Z2DLAyQjH— Jared Goering (@jaredgoering) April 4, 2026

Curvenote Scientific Content Management System

A web-first experience that brings science and data to the surface. Enhance comprehension and maximize impact and reach of your research using rich metadata and interactive figures.