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Surge XTFabFilter One
Free

Free and open source.

 Paid

Paid plug-in with a 30-day trial.

Windows, macOS, Linux Windows, macOS
  • Many synthesis methods, filters and effects
  • MPE and microtuning support
  • Warm self-oscillating filter
  • Aliasing-free oscillator with pulse width modulation
  • Large feature set takes time to learn
  • Single oscillator design limits sound range
  • Needs a host application such as a DAW
Downloadable app Downloadable app
Open source Closed source
License not stated License not stated
No account needed Not stated if an account is needed
Works offline Not stated if it works offline

Checked September 23, 2026

Checked October 2, 2026

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