Mutabor Windows, Linux and Mac OS X. Uses its own programming language to describe pitches, (re)tunings and reactions to events.
L'il Miss' Scale Oven OS X application. Has a proprietary dynamic retuning system called Nuscale.
TonesInTune Add-in to Microsoft Excel (x32 & composition only). Re-introduces dynamic intonation, a key feature of most acoustic music instruments.
Hermode tuning Algorithm/feature embedded in 3rd party applications. Tunes only the fifths and thirds of electronic instruments dynamically in real time.
Local Anomaly by William Sethares
Three Ears by William Sethares
Piano11 by Carlo Serafini