Logo for the ASUS ZenUI software.
ASUS
Extracted from <a rel="nofollow" class="external free" href="https://www.asus.com/event/2014/my/productguide/PG_Phone_Tablet_Sept_Oct.pdf">https://www.asus.com/event/2014/my/productguide/PG_Phone_Tablet_Sept_Oct.pdf</a>