Sparkbox is described as 'helps you to manage images for your design, unlike iPhoto, It is designed to look after the images besides the picture or photograph you took' and is an app in the Photos & Graphics category. There are more than 25 alternatives to Sparkbox for a variety of platforms, including Windows, Mac, Linux, iPad and Android. The best alternative is digiKam, which is both free and Open Source. Other great apps like Sparkbox are XnView MP (Free Personal), Adobe Lightroom (Paid), XnView (Free Personal) and ExifTool (Free, Open Source).
QuickViewer is a graphic image viewer for comfortable browsing of many images. This software performs reading of image data in advance. And drawing the imported image data on the screen with OpenGL. You can browse images with much smoother response than ever before.
Capture One is a leading raw converter and workflow software which enables photographers to reduce the time and effort required to deliver astounding ready-to-use images with excellent color and detail.
Xee is an streamlined and convenient image viewer and browser. It is similar to macOS's Preview.app, but lets you easily browse the entire contents of folders and archives, move and copy image files quickly, and supports many more image formats.