Sustainability

An open source reference manager that collects all your research in a single, searchable interface. You can add PDFs, images, audio and video files, and snapshots. Zotero automatically indexes the full-text content of your library, enabling you to find exactly what you're looking for with just a few keystrokes. Designed to work with the FireFox web browser, but also has the option of using a stand-alone application with translators for Chrome & Safari.

Mendeley is a free reference manager that is especially strong for managing PDFs. Generate citations and bibliographies. Read, annotate, and search your PDF library. You can also securely share your papers and annotations with a project team. You can also discover other papers and other researchers who are reading the same papers as you. There is a subscription fee for cloud storage beyond 2GB.