PicaView is described as 'is the simple, no-hassle image viewing solution. This is an add-on for viewing images in File Explorer that lets you right-click on an image file to bring up a miniature image and image file information' and is an app in the File Management category. There are more than 10 alternatives to PicaView for Windows, Windows Explorer and Mac. The best alternative is SageThumbs, which is both free and Open Source. Other great apps like PicaView are XnShell (Free), Image Resizer for Windows (Free, Open Source), FastPreview (Free) and Pictus (Free, Open Source).