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Eclipse IDE vs BlueJ: catalog facts
Eclipse IDE	BlueJ
Free The open-source application is available without a license fee.	Free Free and open source under the GPL-2.0 with the Classpath Exception.
Windows, macOS, Linux	Windows, macOS, Linux
Huge plugin marketplace covering languages and domains other IDEs ignore Entirely open source and free for commercial use	Designed for beginners learning Java Native installers for Windows, macOS and Linux, including ARM64
The workspace and perspective model feels dated and confuses newcomers Plugin quality varies widely and conflicts are common	Java only Requires a 64-bit operating system; 32-bit users need the old 4.1.4 release
Downloadable app	Downloadable app
Open source	Open source
License: EPL-2.0	License: GPL-2.0-only WITH Classpath-exception-2.0
Not stated if an account is needed	No account needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked September 22, 2026	Official website Full listing and sources Checked October 1, 2026

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