Digital Systemic Emulations has released Awesome Piano, a free instrument for Windows and macOS featuring an 1855 broken and dissonant Pleyel piano.
A simple piano? No, that’s boring. Get ready for some unique sounds: the 1855 Broken and dissonant Pleyel Piano! About 30MB of samples (recorded in .wav 48 kHz 16 bits)
Slightly re-tuned to be able to play with other instruments but keeping dissonant.
Awesome Piano instrument is available in VST (Windows) and VST/AU (macOS) versions, 64-bit supported. The download is instant.
More info and download at Digital Systemic Emulations.