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BeebEm vs b2: catalog facts
BeebEm	b2
Free Free, with source code on GitHub.	Free Free to download from GitHub.
Windows	Windows, macOS, Linux
Emulates both the BBC Micro and Master Series Disc drive and tape relay sound effects	Covers several Acorn BBC models and the Olivetti PC 128 S Runs on Windows, macOS and Linux
Windows only The research does not show recent release dates	Limited to BBC Micro family machines Documentation lives mainly in the repository
Downloadable app	Downloadable app
Open source	Closed source
License not stated	License not stated
No account needed	No account needed
Works offline	Works offline
Official website Full listing and sources Checked September 24, 2026	Official website Full listing and sources Checked September 24, 2026

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