Q. What is the name of the free app to find out what the names are of a flower & or leaf?
Denise, you may be thinking of the App called LeafSnap. This is the App that wass featured at the PHS Gold Medal Plant Showcase (located on the show floor at the 2013 Philadelphia Flower Show). The Gold Medal Plant Showcase display is showcasing 6 Gold Medal winning plants as well as three gardening tools, one of which is LeafSnap Mobile App.
Here is a review of LeafSnap on Leafport.com's blog of Garden Apps, including links for downloading. Please note that this App is for tree identification (including the tree's flower and leaves), not for annual or perennial herbaceous plants.