VectoRise contains custom wallpapers which are high resolution well beyond QHD resolutions at 3200x3200 and usually vector based and minimal. Wallpapers will be added at a slow rate but the quality will never be compromised.
This app does not show ads.

VertIcons Icon Pack contains the same collection of wallpapers as of now.
Suggestions for new wallpapers via email are welcome.

You can follow my collection on G+ here for free but please don't share them without proper credits.
https://plus.google.com/collection/ky7jUE