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BlueJ vs Eclipse IDE: catalog facts
BlueJ	Eclipse IDE
Free Free and open source under the GPL-2.0 with the Classpath Exception.	Free The open-source application is available without a license fee.
Windows, macOS, Linux	Windows, macOS, Linux
Designed for beginners learning Java Native installers for Windows, macOS and Linux, including ARM64	Huge plugin marketplace covering languages and domains other IDEs ignore Entirely open source and free for commercial use
Java only Requires a 64-bit operating system; 32-bit users need the old 4.1.4 release	The workspace and perspective model feels dated and confuses newcomers Plugin quality varies widely and conflicts are common
Downloadable app	Downloadable app
Open source	Open source
License: GPL-2.0-only WITH Classpath-exception-2.0	License: EPL-2.0
No account needed	Not stated if an account is needed
Not stated if it 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 September 22, 2026

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