nomacs - Image Lounge is a versatile image viewer that is small and fast but able to fully handle the most common image formats, including PSD and RAW images.

nomacs - Image Lounge allows thumbnail previews of the current folder as well as including a file explorer panel that allows easy switching between folders.

Additionally, it is possible to synchronize multiple viewers, and the synchronization of viewers running on the same computer or via LAN is possible. nomacs also allow you to compare images making it easy to spot the differences (e.g., schemes of architects to show the progress).

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