To put things in perspective, this software was for Windows 3.1 and Mac OS 7.x with a beta version for Win 95. Those were the days when many of us were still writing HTML by hand to post our pages. It was nice to be able to download someone else's site to my computer to showcase it a workshop, since there was often not an network connection in workshop rooms. I would bring the "WebWhacked" sites on a diskette since, of course, we were all working on desktops.
Nowadays, the ability to save Web page text and images to the the desktop is built right into the Web browsers. In Firefox, simply pick FILE-SAVE PAGE. In Chrome, pick SAVE PAGE AS - WEBPAGE, COMPLETE. In Safari,it is FILE - SAVE AS - WEB ARCHIVE. Don't forget to copy the original page's URL for your citation!
However, the Web now has more types of information available than just Web pages that we want to archive or read locally when there is no Internet available. As students collect assets for a project, they are interested in Web pages, tweets, and videos. If students can download their assets to read and view when they do not have access to the Net, they can work on their projects anywhere. In addition, if educators require students to hand in their downloaded assets with their papers or projects, it can also be a deterrent to student plagiarism.
The app is available for both the Mac and the iPad. Here is a introduction to how it works.
I also made a short video on the Mac of how I saved a tweet with Keep Everything.