Proposed potential uses for Namecoin besides domain name registration include:
Identity systems[9]
Messaging systems[10][11]
Personal namespaces[12]
Notary/timestamp systems (note that this is not unique to Namecoin, other cryptocurrencies could implement this too)[13]
Alias systems[14][15]
Printed copy · Anthology Volume 7, page 64Printed copy from The Tender For Law Anthology, Volume 7, page 64 (printed 13 June 2014). Added by this site; not part of the Facebook export.