High Quality Content by WIKIPEDIA articles! Bookends is a commercial reference management software package for Mac OS X that is used to manage bibliographies and references when writing essays and articles. Its target market is students, academics and professionals. It works with several word processors, including Microsoft Word, Apple Pages, Mellel, Nisus Writer Express, OpenOffice.org Writer and others. Bookends is made by Sonny Software and maintained by its owner and developer Jon Ashwell. The current version is 11.