The Largest Free Law Library
Fastcase recently launched what it claims to be the largest free law library. Granted, that library is online, but that's nothing to take away from the fact that it boasts a collection of 1.8 million pages of federal cases, all in the public domain. The collection also contains all US Appeals Courts decisions dating back to 1950.
The free part involves signing up for a 24 hour subscription or paying US$95 for a one month access.