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MFreeFXBundle vs Airwindows: catalog facts
MFreeFXBundle	Airwindows
Freemium The effects are free to use; an optional paid upgrade unlocks additional interface…	Free Free and open source, with no DRM.
Windows, macOS	Windows, macOS, Linux
Includes several sound-processing effects Shares a common plug-in interface	Hundreds of free effects with frequent new releases AU and VST builds for macOS, Windows and Linux
Some interface features require the optional paid upgrade.	Minimal generic interfaces with few visual aids Installation notes vary from plugin to plugin
Downloadable app	Downloadable app
Closed source	Open source
License not stated	License: MIT
Not stated if an account is needed	No account needed
Not stated if it works offline	Works offline
Official website Full listing and sources Checked September 22, 2026	Official website Full listing and sources Checked October 2, 2026

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