Apps similar to Quick Look Fix include Folder Quick Look. It's paid, but Preview and Eye of GNOME are free. Other options are Seer Pro, Kiview, Xviewer and GNOME Sushi. You can choose from more than 10 Image Viewers like Quick Look Fix for Mac, Windows, Linux, iPhone and iPad.
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.
Scoopy quick inside manipulation of windows folders with excessive (optional?) features but useful preview on paid version. The website is up to date (Nov 2018).
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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.
Preview folders, archives, source code with syntax highlighting, Markdown, Mermaid diagrams, ebooks, and many more file types directly in macOS Quick Look.
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Very much like Folder Preview, Folder Preview Pro allows you to quick look folders in Finder.
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Gloobus-preview is a Gnome extension designed to enable a full screen preview of any kind of file similar to Apple's Quicklook.
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Redact & Annotate images. Hide or mark up essential parts of your image by simply clicking and dragging on it.
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