FREE ATKColoredExpander v2.0 Compressor Plugin
Matthieu Brucher has released version 2.0.0 of ATKColoredExpander, a free and open source compressor effect plugin for Windows and Mac. 
The plugin now uses the JUCE framework and is optimized for SSE4.2 processors on MacOS and AVX processors on Windows.
ATKColoredExpander v2.0 requires universal runtime libraries on Windows as per Microsoft recommendation (see Matthieu Brucher’s blog post for more details).
Supported formats are VST2, VST3 and AU for Mac OS X (10.9 minimum, 64-bit) and Windows (32 and 64-bit). The download is instant, registration isn’t required. If you find the compressor useful, you can make a donation to support the author.
More information and download link on Matthieu Brucher website.