https://www.tracktion.com/products/waveform-free
A highly efficient audio engine, intuitive recording workflows and rapid mixing capabilities make Waveform Free the perfect choice for multi-track band recordings. 15 new audio FX are on hand for processing and support for VST, VST3 and AU opens the door to a world of 3rd party plugin possibilities.

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No track limits.
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It’s cross-platform.
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Full plugin support. ( VST2, VST3, and AU (on Mac).
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It works offline. (Unlike browser-based options)
Waveform’s interface takes some adjustment. It doesn’t follow the traditional “mixer on the bottom, timeline on top” layout that most DAWs use.
Give it a week, and it clicks. But those first few sessions will feel unfamiliar.



Sounds like the core engine is FOSS at least: https://github.com/Tracktion/tracktion_engine?tab=License-1-ov-file. Unless it’s all 100% FOSS, might as well go with Reaper or another paid DAW, though.
Huh, yeah kinda weird to only have part of the project open source. Interesting