Diigo - Diigo is a powerful research tool and a knowledge-sharing community
LINER - LINER AI Copilot is currently powered by ChatGPT/GPT-4, Google Search Engine, and information from high-quality highlights of an enormous number of users from all around the world.
Zotero - Zotero is a free, easy-to-use tool to help you collect, organize, cite, and share research.
Highlight - "Highlight" physical books through conductive pages 📖✨
WorldBrains Memex - Bookmarking for the power users of the web. A privacy focused extension to annotate, search and organize what you've seen online.
LiquidText Ink - A fast, ink based way to review and analyze documents