Lustro is a small application that exports your Address Book contacts to comma separated values, tab separated values, hCards and overwrites your Google Contacts.
Microformats are easy conventions (known as entities) used on web content to explain a particular sort of data. Microformats use the category attribute in hypertext markup language tags (often or ) to assign temporary and descriptive names to entities and their properties and vcard, hcard, span class tag to define CreativeWork, Organization, Event, music, Person, Place and Product.