This document summarizes a presentation about discovery tools and services. It defines discovery tools as library user interfaces that allow searching across library resources independently of any individual system. Fifteen different discovery services are listed, along with evaluation criteria like one-stop searching, faceted navigation, and mobile interfaces. The document evaluates the top five discovery services as Primo, WorldCat Local, Encore, EBSCO Discovery Service, and Summon based on features like unified indexing and relevancy. It notes the most improved tools since 2010 have been AquaBrowser, Primo, and WorldCat Local. Limitations discussed are the presentation only covering the user interface and not content coverage or searching capabilities.