Highly for iOS - Medium-style highlighting in every app and website. 🖌
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.
Highlight - "Highlight" physical books through conductive pages 📖✨
Weava - Workspace to highlight, organize & collaborate on your research articles.
Readwise - Effortlessly rediscover and organize your Kindle highlights
Zotero - Zotero is a free, easy-to-use tool to help you collect, organize, cite, and share research.