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Furnace vs OpenMPT: catalog facts
Furnace	OpenMPT
Free Free and open source under the GPL.	Free Completely free software.
Windows, macOS, Linux	Windows
Supports many classic sound chips in one tracker Compatible with DefleMask modules	Edits IT, XM, S3M and MOD files natively VST plugin and ASIO output support
Tracker interface has a learning curve for newcomers	Windows only for the editor Tracker workflow takes time to learn
Downloadable app	Downloadable app
Open source	Open source
License: GPL	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.