Cornice is described as 'cross-platform image viewer written in Python + wxPython + PIL' and is an app in the Photos & Graphics category. There are more than 25 alternatives to Cornice for a variety of platforms, including Windows, Mac, Linux, PortableApps.com and Electron / Atom Shell. The best alternative is IrfanView. It's not free, so if you're looking for a free alternative, you could try JPEGView or Preview. Other great apps like Cornice are XnView MP (Free Personal), FastStone Image Viewer (Free Personal), XnView (Free Personal) and ACDSee Photo Studio (Paid).
FastStone Image Viewer is a fast, stable, user-friendly image browser, converter and editor. It has a nice array of features that include image viewing, management, comparison, red-eye removal, emailing, resizing, cropping and color adjustments.
ACDSee is a complex, multi-purpose application that serves for viewing, organizing and editing digital photos. Furthermore, images can be shared on social websites or your own space on the developer’s website.
gThumb is an image viewer and browser for the GNOME Desktop. Features Image Viewer * View single images (including GIF animations). Supported image types are: BMP, JPEG, GIF, PNG, TIFF, ICO, XPM. * View EXIF data attached to JPEG images.
You can use the Photos app to view or edit photos and videos in your Pictures library and on OneDrive, and to import photos and videos. The Photos app includes a wide range of editing options to enhance your photos, from automatic fixes to advanced adjustments.