CALI and Cornell LII teamed up to make free, downloadable versions of the Federal Rules of Evidence, Federal Rules of Civil Procedure, and Federal Rules of Criminal Procedure available to students to use on iPads, iPhones, Nooks, or any device that supports .epub files. Here is a link to the downloads. If you want information about how to read .epubs on your mobile phone or desktop computer, you can read information here.
The Reference Office has small, free, print versions of the U.S. Constitution, Federal Rules of Evidence, and Federal Rules of Civil Procedure, courtesy of Lexis and Westlaw. Stop by and help yourself to the rules you need.