Other citation tools
ACS ChemWorx was a free research management and storage system that combines reference discovery and management, professional networking, group and task management and manuscript preparation. In an email to existing ChemWorx account holders in May 2019, ACS Publications indicated that any export from ACS ChemWorx needs to happen before May 20, 2019 and also announced a new collaboration between ACS Publications and Mendeley.
Colwiz was created by researchers at the University of Oxford and is a free reference management tool that provides an easy way to find, read, and cite papers for students, academic groups, and researchers. NOTE: Colwiz is now combined with wizdom.ai. Use the same email address and password used to register on colwiz to access wizdom.ai.
JabRef is an open source bibliography reference manager. The native file format used by JabRef is BibTeX, the standard LaTeX bibliography format. JabRef runs on the Java VM (version 1.6 or newer) and should work equally well on Windows, Linux and Mac OS X.
Paperpile is a reference management tool that features relatively close integration with Google docs and Google Scholar and with a Google Chrome extension.
Papers was a reference management tool originally developed for Mac OS by researchers in the Netherlands Cancer Institute. The product was acquired by ReadCube on March 16, 2016, and a ReadCube Papers app is under development. ReadCube provides a knowledge base for the ReadCube Papers app as well as Papers 3.