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 mashup
Crowbar is a web scraping environment based on the use of a server-side headless mozilla-based browser. It is used as a research prototype to investigate how to enable the running of Piggy Bank javascript scrapers from the command line and thus automatin