Re the rewire/ vsti things. Both would be good. Calling program 'drag and drop' a DAW Plugin is ... to be as nice as possible ... a streeeeeeeeeeeeeeetch.

KVR seems to report at least one new midi app a month that is functioning as a full-blown VSTi plug in. For examples, look at the 'Thesys' by Sugar Bytes, 'Catanya' by 7Aliens or, on an admittedly simpler basis, 'Harmony Improvisator' by cochleor. Midi processing is not that cpu intensive.

PGMusic, bless their hearts, seem to keep a steady beat to their own drum while trying to break new ground with their products ... as opposed to incorporating mainstream programming principles as simple as file names longer than 8 characters or addressable folder/ directory structure, etc.

It is what it is and I like it very much ... but use of the word "plugin" to describe a drag n' drop feature with a reduced size window is ... well, you decide.

Prado