nomacs - Image Lounge

nomacs is a free, open source image viewer, which supports multiple platforms. You can use it for viewing all common image formats including RAW and psd images.

Get started

GNU General Public License v3.0. GitHub v3.16

Image viewing

Supports the most common image formats including RAW.

Image editing

Supports cropping, resizing, rotating, and color adjustments, and more.

Viewer synchronization

The same action (like panning, zooming, etc.) can be performed on multiple viewers, making comparing two images easy.