ThemeForest - Simon - A Simple Tumblr Theme | 1,45 MB
Simon is a simple and adaptive Tumblr theme which is easy to install, customise, and is an ideal first theme to use with Tumblr!
Aimed at writers, with strong typography, this theme gives a tailored view to each device (Android, iPhone, iPad, Desktop, etc) that visits it and only serves the content that is required, helping to speed up delivery of your site.
DEMO:
http://themeforest.net/item/simon-a-simple-tumblr-theme/2877370