To quote from the tool's website:
Piggy Bank is an extension to the Firefox web browser that turns it into a “Semantic Web browser”, letting you make use of existing information on the Web in more useful and flexible ways. Some screen shots demonstrating Piggy Bank are below :
What can I do with this?
Combine information from several web sites and browse it all together:
- see where coffee shops are located relative to restaurants and theatres,
* find schools and subway stations in the neighborhoods of apartments for rent,
* learn how progress has been made in a research field by chronologically sorting scientific papers, industrial product releases, news articles, etc., collected from various sources.
- Browse and search through an existing web site in better ways than the site allows you to.
- Save information you have found on the Web, not as bookmarks but as full “database” records that can later be sorted and searched by any attribute they carry.
- Tag each item you save with several relevant keywords rather than filing it into one single bookmark folder.
- Share the information you have saved by publishing it onto a Semantic Bank with just one mouse-click.
- Do all that, and more, right inside your current, familiar Web browser.
This is an extremely well documented and organized project. There are detailed "how-tos" for both users and developers as well as opportunities to join a mailing list and licensing information for use.