Although these more advanced tools are appealing, it might be frustrating to have several hundred bookmarks stored in an application that stops being supported and updated. Other vendors have produced products that can automatically transfer a web site to one's local disk, or that can check web sites for changes and then transfer them. Some of these features are being built into newer versions of web browsers. Some resemble the bibliographic packages used to manage journal articles. When they change the software notifies the user.
Software can go out and check web pages on a regular basis.
When something changes the pages are automatically transferred to your machine. Page retrieval can be scheduled for 3am. This is potentially a good way to get one's digital morning paper. It's a great tool for demonstrations. Web Whacker does this on both Mac and Windows.