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ART vs A Photo Tool (Libre): catalog facts
ART	A Photo Tool (Libre)
Free The software is free under its open-source licence. Hosting, hardware and external…	Free Free to download and use under the GPLv3.
Windows, macOS, Linux	Linux
It keeps RawTherapee's processing quality while cutting the number of controls, which makes the same raw engine much…	Straightforward exposure and color adjustments Custom black-and-white conversion
Trading away controls means less fine adjustment than RawTherapee, and it has no library or cataloguing features.	Limited file format support beyond JPEG No layers or advanced retouching
Downloadable app	Downloadable app
Open source	Open source
License: GPL-3.0	License: GPL-3.0-or-later
Not stated if an account is needed	Not stated if an account is needed
Not stated if it works offline	Works offline
Official website Full listing and sources Checked September 22, 2026	Official website Full listing and sources Checked October 1, 2026

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