Thinglink.org is an open database where makers can register their work for free and create labels for their products. Here are pictures of objects registered with thinglink and thingtagged on Flickr.
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The Sheep Market
Yard Sale Treasure Map
Google APIlity Library
Flickr Api Explorer
An Interesting 2005 on Flickr
ActionScript Library for Flickr
Objective-C Wrapper for Flickr API
APIs, mashups and code. Because the world's your programmable oyster.
Executive Editor, ProgrammableWeb. Author, Map Scripting 101. Lover, APIs.