Zotero - Zotero is a free, easy-to-use tool to help you collect, organize, cite, and share research.
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.
Mendeley - Easily organize your papers, read & annotate your PDFs, collaborate in private or open groups, and securely access your research from everywhere.
Highlight - "Highlight" physical books through conductive pages 📖✨
Citavi - Citavi is a program for Microsoft Windows that manages literary references and organizes organizational knowledge.
LiquidText Ink - A fast, ink based way to review and analyze documents