Around the mid-2000s,a researcher wrote a paper proposing a new way to mathematically analyze digital images. He further proposed that by using his method it would be possible to take a photo from a web page, and shrink it to fit the cell phone screens at the time, preserving all of the most important parts of the photo, e.g. the models posing in whatever ad. In 2005 a couple released what's AFAIK the 1st software based on that research, called Retarget. And all the object removal apps & similar tools in photo editing apps followed. Few if any followed the original purpose of shrinking the photo, instead focusing on removing whatever you selected. Image Resize Guide will do that too, but it can also shrink a photo, narrowing it like the original proposed idea. That gives it a niche that apps like Inpaint can't compete in.
Image Resize Guide 2.2.9 also includes Photoshop compatible plugins... mileage varies with these kinds of tools depending on the photo & what you want to do with it, and at the same time, one tool might work better than another for certain tasks on certain photos. Those plugins let you compare the results using the tools in your image editor with what you get using Image Resize Guide. In quick testing Image Resize Guide does work, and can work quite well, but I found that I might have to use it more than once, e.g. using the removal brush to highlight parts of the image that didn't turn out correctly the 1st, and sometimes 2nd try.
The app itself takes up just over 7MB in the program's folder, with an additional folder in C:\Users\ [UserName]\ AppData\ Roaming\, and added folders just for the plugins [for some reason, since they're already included in the program's folder]. The registry gets an uninstall key plus 2 keys for the app listing the paths for the app & plugins. There is no 64-bit version. Copied from my VM it works fine in Win110 as-is.