Mint 18 Sarah KDE on my dual monitor setup
I'm using the "Helium" Desktop Theme, "Yosemite Transparent" Window Decorations, "Flattr" Icons with a few that I've replaced and/or customized, "HexGrey" Color Scheme, and customized "HexGrey" QtCurve Widget Style. For Cairo-Dock, I'm using the "Clear" theme modified with the background color changed to match my panels. The wallpaper is called "colorful_polygons" that I found on Google. The Plasma widgets on the far right panel are "Weather Widget" (Downloaded), "Analog Clock", "System Load Viewer", and "Thermal Monitor" (Downloaded).
On a side note, I like the way the forum resized my 2 images. It actually matched the size difference of my 2 monitors pretty closely.