Norconex HTTP Collector
Norconex HTTP Collector is a full-featured web crawler (or spider) that can manipulate and store collected data into a repositoriy of your choice (e.g. a search engine). It very flexible, powerful, easy to extend, and portable. Can be used command-line with file-based configuration on any OS, or can be embedded into Java applications using well documented APIs.
Visit the web site for binary downloads and documentation: