RockinBlueGreen is a simple, 2-column (right sidebar) theme with rounded corners and a nice blue and green color scheme.
Four Blank WordPress Themes is a set of four templates which contain the CSS needed to position the header, footer, sidebar and main content area. Ideal of those starting off with a new theme design.
Garden is a four column Zen style with fluid width, custom header, background and icons and widget support.
Coincidence is a two column fixed width, widget ready theme.
dark.cash is a dark and simple theme that utilizes a slight glass effect.