There are 2 repositories under photoviewer topic.
The most easy to use responsive image viewer especially for mobile devices
An iOS/tvOS photo gallery viewer, useful for viewing a large (or small!) number of photos.
🖼️ A JS plugin to view images just like in Windows.
A fully customizable photo viewer ViewController to display single photo or collection of photos, inspired by Facebook photo viewer.
Windows Photo Viewer gives "Out of memory" error when opening images with unknown color profiles (like Xiaomi/Huawei screenshots). This will fix it
You can use a ready-made custom alert controller.
A library provides a GalleryViewPager and a GestureImageView to enable you to preview pictures with scale, drag and fling gestures.
Android App for TVs to view Photos.
DLIViewer is a simple image viewer for Windows tries to stick to the principle: Lightweight, Fast, Open.
A React Component for swipeable views, includes useful components like pinchable images
static site
A Tkinter application to select photos from a folder and copy them to another folder