Cantabile is described as 'Music workstation for live performing musicians. Build your ideal rig - one that leaves you free to focus on giving your best performance' and is a music production app in the audio & music category. There are more than 25 alternatives to Cantabile for a variety of platforms, including Windows, Mac, Linux, iPhone and iPad apps. The best Cantabile alternative is ComposeYogi, which is both free and Open Source. Other great apps like Cantabile are Ableton Live, GarageBand, Carla and Bespoke Synth.
You can use it as VST in your DAW or as Standalone!!!