Zotero

Zotero is completely free to use, avoiding subscription fees, as emphasized in its philosophy of accessibility regardless of financial resources, making it a cost-effective alternative to commercial tools.

It automatically captures bibliographic information from web browsers, PDFs, and library catalogs, streamlining the collection process for researchers, as highlighted in the key features.

Supports thousands of citation styles with seamless word processor integration, enabling precise formatting for academic papers, which is a core feature mentioned in the key features.

Allows highlighting and adding notes directly to PDFs within the application, reducing the need for external tools for document management, as noted in the key features.