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nomacs vs Eye of MATE: catalog facts
nomacs	Eye of MATE
Free Free and open source under the GPL 3.0.	Free Free and open source as part of the MATE desktop.
Windows, macOS, Linux	Linux
Opens RAW camera files and Photoshop PSD documents Synchronises pan and zoom between two windows or two machines	Lightweight and quick to open images Plugin support for extra features
Not an editor; adjustments are minimal The interface exposes a lot of panels at once	Linux only Viewer only, with no library management or real editing
Downloadable app	Downloadable app
Open source	Open source
License: GPL-3.0	License: GPL-2.0
No account needed	No account needed
Works offline	Works offline
Official website Full listing and sources Checked September 21, 2026	Official website Full listing and sources Checked October 1, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.