Similar to Windows_CardSpace

Amazon Product Advertising API

Blackle

Content Management Interoperability Services

FlexiScale

Romeo (social network)

Goodreads

Scribd

SlideShare

Web Services Description Language

Amazon Vine

IFTTT

Windy (weather service)

Airliners.net

OpenSeaMap

Semantic Web

DataNucleus

NORAD Tracks Santa

BigQuery