VuFind is an open source discovery tool that provides a unified search interface for a library's catalog and other resources. It was developed at Villanova University and is now used by many academic libraries. VuFind crawls and indexes data from a library's ILS and other sources, and provides faceted searching and display of results. It also integrates features like holds, social sharing, and citation export. While originally built for Voyager libraries, it now supports other ILSs through custom drivers and is highly customizable. Many libraries have implemented VuFind locally to provide an enhanced discovery experience for users.