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. It also shows animation for formats which support this.
It is designed to take full advantage of touch controls, allowing you to swipe through images in a folder one by one. You can of course also zoom and rotate files using multi-touch gestures.
Xee can also display huge amounts of metadata from image files. For this, it uses Image::ExifTool, one of the most comprehensive metadata libraries.
Loading images directly from archive files is also possible, and Xee works very well as a comic book reader.
Xee offers multiple visual styles. This allows you to, for instance, pick one which is less distracting while sorting through photos.