Memex

Memex is a browsing copilot and knowledge management tool that allows users to save, organize, annotate, and share web pages, PDFs, and videos. It offers AI-powered summaries and chat, and integrates with popular note-taking apps, aiming to provide a comprehensive system for research and learning.

Memex is a strong match for URList. It offers comprehensive features for saving, organizing, and annotating web content, including URLs, PDFs, and videos. It explicitly mentions organizing content into 'Spaces' (similar to lists/sections) and allows for sharing with non-Memex users. The ability to add notes and highlights directly on content aligns with contextual side notes. While it's primarily an extension, the core functionality of curating and sharing web resources is very similar.