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Greenfoot vs Processing: catalog facts
Greenfoot	Processing
Free Free to download.	Free Free and open source.
Windows, macOS, Linux	Linux
Visual feedback while writing real Java code Official textbook and teacher community	Immediate visual feedback when a sketch runs Large set of built-in examples, tutorials and books
Focused on education rather than general development Java only	Simple editor compared with a full IDE Aimed at creative coding rather than general application development
Downloadable app	Downloadable app
Closed source	Open source
License not stated	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 October 1, 2026

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