Want a shuffled playlist but still in need of some control? Maybe start with a little Rock and end with some Christian Rap? 

PlayGrit is a grid representing songs in your iTunes library. All songs are represented by a single colored dot. The color represents the sorting entity. By default the grid is sorted by genre, so each color represents a different genre. 

On this grid you can draw a line connecting the dots and thus creating an ordered list of songs or playlist.