Some awesome themes for the Linux Mint 15 MATE desktop. Numix: http://satya164.deviantart.com/art/Numix-GTK3-theme-360223962. This is a very nice flat theme for MATE that is very monochome and stylish. Clearlooks Phenix: http://www.jpfleury.net/en/software/clearlooks-phenix.php. This is a GTK 3 port of the venerable Clearlooks theme. Holo: http://tiheum.deviantart.com/art/Holo-280076980. This is a very good theme that mimics the look of the …