Example image of eyePlorer eyePlorer map for 'Knowledge tags': Digital image Document Metadata Table (database) Web page Index term Annotation Categorization Classification Comment Hyperdata Hyperlink Note (disambiguation) Reference Semantics Enterprise social software Knowledge management Tag Knowledge Tacit knowledge Keyword 2008 Jumper 2.0 Open source September 29 Web 2.0 Enterprise bookmarking Delicious Social bookmarking Flickr StumbleUpon Technorati YouTube ITunes Winamp Gracenote Metaknowledge Knowledge base Meta-information List of open source healthcare software