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.
You can use a ready-made custom alert controller.
Windows Photo Viewer gives "Out of memory" error when opening images with unknown color profiles (like Xiaomi/Huawei screenshots). This will fix it
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