Open-source Glasp alternatives

Zotero is a free tool for managing research. It collects references as you browse the web, organizes them into collections with tags and saved searches, and helps you annotate, cite and share them. It is available for Mac, Windows, Linux, iOS and Android, and the source code in this repository is open.

A browser connector senses research material on sites it recognizes and saves it with a click. Citations and bibliographies can be generated for any text editor and directly inside Word, LibreOffice and Google Docs, with support for over 9,000 citation styles. A companion web tool, ZoteroBib, creates quick bibliographies without installing anything.

Syncing across devices is optional, and synced data can also be reached from a web browser. Libraries can be shared in groups, for co-writing a paper, distributing course materials or building a collaborative bibliography, with no limit on how many people join at no cost. The site also offers paid storage upgrades for synced files.

Memex is a browser extension from WorldBrain for curating, annotating and discussing valuable content and ideas on the web, whether you work as an individual, a team or a community. It is available as an extension for Chrome and Firefox and focuses on research and note-taking from the pages you read.

The repository topics emphasize annotations and full-text search, so saved pages and your highlights and notes can be found again later. The product's homepage also states that Memex exposes its dashboard actions through the Model Context Protocol (MCP), with a discovery manifest and a gateway that returns matching actions on demand, so AI tools can work with it.

The code is written in TypeScript and is public on GitHub, but the repository metadata does not give a license, so check the project terms before reuse. The extension runs inside your browser, and sharing and discussion features depend on the vendor's own services.

Context Note is a note-taking Chrome extension that lets you capture notes on the web together with the context they came from. Rather than copying text into a separate app and losing the source, you can review notes and jump back to the original page for details.

Its notebook view lets you review notes on a book or article while jumping back to the context, and the tagbook organizes notes with a tag system. A Quill-based rich text editor is embedded for writing. The extension is built with Vue 3, TypeScript and Vite.

You can install it from the Chrome Web Store or download a zip package from the GitHub releases page. The project is MIT licensed, has a contributing guide and a demo video in the README, and suits students and researchers who annotate web content as they read.