Mainstreem by WooThemes

A vibrant personal blog theme with a colourful selection of styles, built on WooThemes flexible theme framework, boasting a selection of theme options, most importantly it’s FREE!

These are some of the features that you will find within the theme:

Integrated banner ad management.
Widgetized sidebar, with some Mainstream-specific custom widgets to allow you full control of what happens in your sidebar.
5 different colour schemes to choose from.