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Flipbook vs Pencil2D: catalog facts
Flipbook	Pencil2D
Free Free and open source under GPL-3.0-or-later.	Free Free and open source under the GPL, developed entirely by volunteers.
Linux	Windows, macOS, Linux
Simple frame-by-frame drawing workflow Reusable colour palettes across projects	Frame-by-frame drawing with onion skinning, which is what hand-drawn animation needs Bitmap and vector layers in one project
Early version with file format changes between releases Linux and GNOME only	Minimal by design; complex productions outgrow it quickly No rigging, tweening or particle systems
Downloadable app	Downloadable app
Open source	Open source
License: GPL-3.0-or-later	License: GPL-2.0
No account needed	No account needed
Works offline	Works offline
Official website Full listing and sources Checked October 1, 2026	Official website Full listing and sources Checked September 21, 2026

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