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nomacs vs Oculante: catalog facts
nomacs	Oculante
Free Free and open source under the GPL 3.0.	Free Free open-source software.
Windows, macOS, Linux	Windows, macOS, Linux
Opens RAW camera files and Photoshop PSD documents Synchronises pan and zoom between two windows or two machines	Fast viewer built in Rust Wide image format support
Not an editor; adjustments are minimal The interface exposes a lot of panels at once	Project is in maintenance mode Editing features are basic
Downloadable app	Downloadable app
Open source	Open source
License: GPL-3.0	License not stated
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 September 23, 2026

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