MicroID is not an authentication or single-sign-on service, just a straightforward method for identifying content ownership that complements existing technologies such as OpenID and microformats.
Firefox Extension for interaction with Microformats
microformat based dynamic mashup foo
Ping form für Seiten die Microformats enthalten
The Safari Microformats plugin notifies you when the author of the website has published Microformats and allows you to easily import hCards and hCalendars in Address Book and iCal
Add hCard contacts to your address book
Carnival is a free microformat parser for Safari. Download it, fire it up, and whenever a microformatted site is viewed in Safari, Carnival will glowgreen. Click on the icon to view the available data.