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jabba vs VMR: catalog facts
jabba	VMR
Free Free and open source under the Apache 2.0 licence.	Free Free and open source under the MIT licence.
Windows, macOS, Linux, Command line	Windows, macOS, Linux, Command line
Same commands on Windows, macOS and Linux Installs and switches between many JDK versions	One tool for many languages and SDKs Choice of terminal UI or plain CLI
Maintained fork with a small community No GitHub releases listed in the repository	Relies on its own cached version lists for available SDKs Smaller community than single-language managers like nvm or pyenv
Downloadable app	Downloadable app
Open source	Open source
License: Apache-2.0	License: MIT
No account needed	No account needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked October 2, 2026

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