Agave is not a groundbreaking application. None the less, it's one of those diamonds hidden in the dirt cases.
For a long time, I've missed the colorpicker that Macromedia Fireworks provided on Windows. And there it was, agave. A simple and must have application for all webdesigners and graphicartists. It's really just a colorscheme, but contain a colorpicker as well. A colorpicker is really nice to have when you wanna grab a certain colored pixel, and the colorscheme helps you decide what colors plays well together.