base_viewer

base_viewer is a lightweight and intuitive piece of software designed to provide you with a quick means of browsing images across directories, while also allowing you to sort the various photos into several different folders.
The application is relatively simple to work with as you can explore picture folders and subfolders, simply by scrolling down, but it does take a while to learn which commands are associated to which toolbar buttons. However, by hovering over each button, you can learn what it does thanks to the indication displayed in the status bar.
base_viewer allows you to display a limited number of image formats, specifically JPEG, PNG and Bitmap files, all other types of pictures not being supported, such as ICO, GIF or TIFF.
For pictures that are larger than a user-defined value, you can choose to view the split in two. Moreover, the 'Auto Slider' feature enables you to set a preferred photo change interval, in milliseconds, with the default value being 500.
An interesting feature of base_viewer is the ability to quickly send images to pre-assigned folders, simply by pressing a button. The application's toolbar contains six buttons to which you can associate individual paths, allowing you to place each photo in the previously set location, in a flash.
Aside from the ability to browse across directories and quickly sort files into specific folders, base_viewer is rather restricted in terms of functionality, so it is unlikely that it will become a popular utility, particularly when it faces a lot of competition from similar tools.
Nonetheless, you can use base_viewer to explore your picture folders and quickly organize all your images, saving you time and effort, by enabling you to scroll through all files with ease.