Klevgränd has released the Kuvert envelope shaper for iPad and desktop.
Kuvert allows a user to draw five different envelopes. These envelopes control different effect parameters, and can be drawn freely or onto a grid. The envelopes are looped, while the incoming audio isn't (unless a user is feeding it looped material). It is designed to be a way of altering sounds, including revitalizing looped material within a few seconds.
Price: $7.99 (iOS), $29.99 (AU / VST)