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BlueJ vs jGRASP: catalog facts
BlueJ	jGRASP
Free Free and open source under the GPL-2.0 with the Classpath Exception.	Free Free to download.
Windows, macOS, Linux	Windows, macOS, Linux
Designed for beginners learning Java Native installers for Windows, macOS and Linux, including ARM64	Data structure viewers that draw textbook-style diagrams Control structure diagrams for many languages
Java only Requires a 64-bit operating system; 32-bit users need the old 4.1.4 release	Requires Java 11 or later Eclipse plugin has not been updated since 2020
Downloadable app	Downloadable app
Open source	Closed source
License: GPL-2.0-only WITH Classpath-exception-2.0	License not stated
No account 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 2, 2026

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