generated at
web annotation
Comparison of notetaking software
Social bookmarking
Some reference management software packages also support web annotations
Backlinks
Online deliberation
Folksonomy
Metadata
Threaded discussion
Virtual graffiti
Comparison of software saving Web pages for offline use

googleweb annotation
Google画像検索web annotation
Google定義検索 web annotation
wikipediaweb annotation
weblio web annotation
kotobank web annotation
jisho web annotation