Highbrow isn't an image editor. There are dozens of great image editors out there.
And it isn't an image organizer. There are several competent image organizers.
Highbrow is an image browser and viewer designed to let you view the images stored on your computer without complexity or visual clutter.
Easily rename, copy, move, or trash files from within Highbrow
Drag windows around the screen from anywhere on the image
Pinch to zoom, and swipe, tap, or click to navigate
Set images as desktop picture using a simple right-click menu
And use the Window menu to set windows to the desktop level so you can have a slideshow playing in the background while you work!