다음 OPEN API
http://dna.daum.net/DNALatte/openapi/about
Twitter API
http://apiwiki.twitter.com/
youtube API
http://code.google.com/intl/ko-KR/apis/youtube/overview.html
Flickr
http://www.flickr.com/services/api/
대표적인 응용 사례
http://yfrog.com/
http://www.twitpic.com/