From Martin Aignesberger:
WebSite-Watcher checks your favorite websites for updates and changes. WebSite-Watcher saves the last two versions of websites to your harddisk and highlight all textual changes. Supports IE,NS, or Opera Browser-Integration, Import and Export
What's new in this version:
Version 13.1 added Internet Explorer Macros / new option when recording new macros, DownloadPageToString plugin, and XML files are now automatically handled as TEXT files.