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mtPaint vs CorePaint: catalog facts
mtPaint	CorePaint
Free Free and open source under the GPL-3.0.	Free Free and open source under the GPL-3.0 licence.
Windows, Linux	Linux
Edits indexed palette and 24-bit RGB images Layers, channels and animation support	Light on resources and dependencies Works on any desktop environment
Basic tools compared with full photo editors No release binaries published on the GitHub repository	Basic painting tool, not a full image editor Little standalone documentation on the project site
Downloadable app	Downloadable app
Open source	Open source
License: GPL-3.0	License: GPL-3.0
No account needed	Not stated if an account is needed
Works offline	Not stated if it works offline
Official website Full listing and sources Checked October 1, 2026	Official website Full listing and sources Checked October 1, 2026

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