Do you use references in more than one location (work, school, home)? Are you a member of group (laboratory, study group, class) and want to share a central library of related references? With library synchronization (sync) it's easy. Bookends lets you effortlessly keep your references and groups in sync across a local network or the Internet, so you no longer need to schlep your databases from one computer to another.
Sometimes it's better to sync alike and sometimes it's better to sync different.