Dapper: Build API and Extract Contents from Any Websites
Have you ever thought of building an extension or pulling contents from other websites which have not got RSS feeds or API available? Dapper is a service that allows you to extract and use information from any website on the Internet. For those familiar with web services, you can think of Dapper as an API maker. For the rest of you, Dapper allows you to build web applications and mashups using data from any website without any programming.
Dapper is really easy to use. During the beta, Dapper is free and open to all. In the future, non-commercial and small uses will remain free. Dapper works on the HTML of any web page. It does not currently work with XML, Flash, or Javascript. If a web page has a Javascript contained within, the Javascript sections will simply be disabled, but you will be able to work with the rest of the page.
However, Dapper’s users have the sole obligation to respect the copyrights of content they use from the web. Dapper will not be held liable for any sort of copyright infrigement, and will immediately comply with any verified request by the lawful owner of the content to cease using his content.
Source: http://www.dapper.net/