Findory
Findory was a news and blog aggregation website that utilized collaborative filtering to provide users with personalized newsfeeds and news e-mails. Findory collected a history of which articles a user clicked, a form of passive filtering, to recommend articles preferred by similar users. Along with news and blogs, Findory provided personalized podcasts and video, personalized web search, and a variety of access methods, including a REST API, e-mail subscription, and mobile phone access.