CherryTree - A hierarchical note taking application, featuring rich text and syntax highlighting, storing data in a single xml or sqlite file.
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.
Joplin - Joplin is a free, open source note taking and to-do application, which can handle a large number of notes organised into notebooks. The notes are searchable, tagged and modified either from the applications directly or from your own text editor.
Highlight - "Highlight" physical books through conductive pages 📖✨
Diigo - Diigo is a powerful research tool and a knowledge-sharing community
Highly for iOS - Medium-style highlighting in every app and website. 🖌