vladg/sound has released Limiter No6, a freeware modular limiter suited for mastering purposes. It's available for Windows 32- and 64-bit and as 32-bit VST plug-in for Mac OS X.
- 5 modules: RMS compressor, peak limiter, high-frequency limiter, clipper, true peak limiter.
- High-quality signal processing to use for mastering purposes.
- Brickwall and soft limiting with different timing settings.
- M/S and multiband modes.
- Optional 4x oversampling.
- True inter-sample peaks (ISP) limiting.
- Analog-style indication.
- 2 different GUIs.