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