Your screenshot is the menu for the
MATE Edition of Linux Mint. It is the same menu for version 16 (Petra) as it is for version 13 (Maya). Your screenshot shows the "Favorites" menu... notice in the top right corner that you may also select the "All applications" menu, which will change the appearance slightly.
You can find your nearest download mirror for Linux Mint
MATE Edition at:
http://blog.linuxmint.com/?p=2493
Linux Mint offers several other editions (Cinnamon, KDE, Xfce). You can compare the differences at Linux Screenshots:
http://www.linuxscreenshots.org/?distro=mint
Cheers!