Software advertised on the web is often showed in some version of what it might look like on the shelf. Even if there is no box; the software is ordered online and downloaded. There’s no physical tangible artifact. No box, no printed manual, no shrink-wrap, no CD. But the box denotes “I’m for sale” and persists as a representation of the purchase.

Note that some of the above may be actually available in boxes, but I suspect most of them are not. Indeed, some of the box images are incredibly simplistic, iconic rather than representative of what you might see in a store. Maybe someone read these Photoshop tips for creating an image of a product box.