Dolphin Quick View has been discontinued. Similar apps include Eye of GNOME, which is free and open source. Other options are Seer Pro, Kiview, GNOME Sushi and Folder Preview. You can choose from more than 10 Image Viewers like Dolphin Quick View for Linux, Mac and Windows.
Eye of GNOME is the official image viewer for the GNOME Desktop environment. With it, you can view single image files, as well as large image collections. The Eye of GNOME supports a variety of image file formats.
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This is a quick look tool for Windows. Acts just like the one in OS X , but Seer is more powerful and faster.
GNOME sushi is a file previewer for the GNOME desktop environment. It is available as a standalone package that integrates with GNOME Files (formerly named Nautilus).
Folder Preview is a Quick Look extension that lets you preview the contents of a folder.
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WinQuickLook allows you to select a file in Windows Explorer or on your desktop and then simply press the spacebar to see the contents of the file without having to open it with a special application.
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QLStephen is an Apple OSX Quick Look plugin that lets you view plain text files without a file extension. It is useful for reading files like README, INSTALL, CHANGELOG, Makefile, Rakefile and CapFile (files that the default Quick Look plugins don't handle).
By default, macOS doesn't provide previews and thumbnails for WebP, a modern image format providing superior, lossless and lossy compression for images on the web. WebPQuickLook fills this gap by allowing you to see previews and thumbnails of .webp images on your Mac.
eom or the Eye of MATE is a simple graphics viewer for the MATE desktop which uses the gdk-pixbuf library. It can deal with large images, and can zoom and scroll with constant memory usage. Its goals are simplicity and standards compliance. Eye of MATE is a fork of Eye of GNOME.
Quick Eye is a quick look application for Windows. Just press the space bar to quickly preview files. This software is also recommended for people who are used to macOS.
When Quick Look spacebar preview of your Mac doesn't work and you end up with the thumbnail of the photo, you can use Quick Look Fix from the menu bar.
Gloobus-preview is a Gnome extension designed to enable a full screen preview of any kind of file similar to Apple's Quicklook.
