Kuvva is a good, free program only available for Mac and has been created by Kuvva.
More about Kuvva
Since we added this program to our catalog in 2012, it has managed to achieve 3,239 downloads, and last week it gained 2 downloads.Its current version is 1.0 and it has been updated on 18/06/2012. It's available for users with the operating system Mac OS X and former versions, and it is available in English. Kuvva is a slick software that takes up less storage space than many programs.