Now that's an old thumbnail picture. Android 4.x on an old-style LG phone, along with the "green blocks" design play store (just after the android market rebrand)
wordpress.org = the foundation making the software wordpress.com = the company (well, its parent, Automattic) paying the WP foundation, offering paid managed WP hosting
WP Engine = a third party company, just plainly offering plain managed WP hosting
Of the above, the company behind wordpress.com started this hate campaign against WP Engine
There are different flavours of Ubuntu with the other desktop environments (called Xubuntu, Kubuntu, and so on). The posted screenshot is indeed a mishmash of Gnome and Xfce though.
Beatless