Not very special, but contains some nice elements - "Purveyour Mobile UI"
一瞬之光 Yung-Chen Nieh
PH BOOK Contemporary Architecture
G: Illustration / I really really really like the character design and styling of this app explanation.
Aviasales L (Material Design) by Mark M
《編輯樣》王聰威 著 | 聶永真, 2014
Android L for Sketch 3
Iphone App GOODGOODS