Gravatar

Gravatar
Type of site
Avatar hosting
OwnerAutomattic
Created byTom Preston-Werner
URLgravatar.com
CommercialYes
RegistrationOptional

Gravatar (a portmanteau of globally recognized avatar) is a service for providing globally unique avatars and was created by Tom Preston-Werner. Since 2007, it has been owned by Automattic, having integrated it into their WordPress.com blogging platform.