RafaBot is a multi-threaded web spidering robot for bulk web site downloads. It can download entire websites from a starting URL, search engine results or web directories and optionally follow external links. The downloaded files are saved to your hard drive, so you can browse them offline. To limit the files that are downloaded, you can define several filters based on URL, date modified, keyword, file type, file size and more as well as the depth of the spidering process. The program cannot handle sites that contain Java script or dynamic content which limits the use to plain HTML sites.