Solitude is a great theme that is very flexible, uses html5 and css3, and has lots of cool features.

The Main Features are

•     Clean, tableless, static design
•     5 page types for a versatile site
•     Drop down Navigation
•     5 color schemes for ultimate control
•     Heavily customizable in the dashboard for a unique look
•     Uses the power of html5 and css3, including css3 animations
•     Mobile version of the site
•     Many custom templates/ custom styling for blocks
•     Simple and elegant typography
•     Compatible with most recent versions of all major browsers
•     Smooth scroll to top functionality
•     And much more