Zotero

Zotero [zoh-TAIR-oh] is a free, open source, easy-to-use tool that helps collect, organize, cite, and share research sources such as bibliographic data, social media links, web pages and PDF files, installed in a web browser as a Firefox add-on.

The curatorial staff of The Magnes Collection of Jewish Art and Life maintains many research resources on Zotero, and shares them in a dedicated group page.