HD Wallpaper: Mystical Library
The 1st HD image featured from Bonnyb's portfolio. The image can be saved free under CC0 license and use in non-commercial (desktop backgrounds, homescreen phones) and commercial (apps, templates, blogs...) projects.
Widescreen Desktop / Macbook (Retina): 2880x1800 (fits on: 2560x1600, 1920x1200, 1440x900)
Samsung Galaxy Tab & iPad: 2048x1536 (compatible with almost all tablets)
HTC, Samsung Galaxy & iPhone: 1080x1920 (compatible with many smartphones)