Apps similar to Chord Pad by Plastic include Scaler. It's paid, but Canon: Chord Composer and Chordbot are free. Other options are Instachord, RapidComposer, Chordjam and Captain Chords. You can choose from more than 10 Music Production Apps like Chord Pad by Plastic for Mac, Windows, iPad, iPhone and Android.
Chord Player is a MIDI processor plug-in to help play chords and progressions through configured key presses that trigger chords in various ways including strumming. It's available for Windows and Mac in VST and Audio Unit plugin formats.
"ChordPolyPad" is a MIDI chords player that allows you to create chord sets from a large internal library, from any combination of notes, or from chords generated randomly. Each set consists of 8 groups of 16 pads, or 2 groups of 64 pads.
