This site used to host kernel and user-space code for Linux extended attributes and access control lists. The kernel patches have meanwhile been merged into the mainline kernel, and the other user-space patches have been merged into their respective packages. The attr and acl user-space packages are hosted on savannah.nongnu.org:
Information left on this site:
Extended Attribute and ACL manual pages
Acl-devel mailing list and archive
Information about richacls, an implementation of native NFSv4 ACLs on Linux, can be found here.