Wonderflux is An advanced creative Open Source wordpress theme framework. it has been built from the ground-up to take advantage of WordPress 3.0 and above.
Wonderflux allows you to rapidly develop highly sophisticated, custom WordPress theme with just a handful of files (minimum is just style.css) using the principle of a Child theme.
Wonderflux supports all the latest and greatest WordPress functionality. It’s a solid, easy to update, flexible platform you can use for any WordPress website.
License : GPL v2 license