Matthieu Brucher has released ATKCompressor and ATKExpander, free mono compressor and expander plugins for 64-bit Mac OS X (10.8 minimum) and Windows (32 and 64-bit) in VST2, VST3 and AU plug-in formats.
I’m happy to announce the release of three new audio plugins based on the Audio Toolkit. It is available on Windows and OS X (min. 10.8) in different formats.
Both plugins are available at no cost via SourceForge.