Iridium

RocketTheme’s Iridium is a WordPress 3.0 theme that has six style variations and a ton of widgets out of the box. It’s very graphic and great for sites that need more than a subtle look and feel.

Indian Flowers

This theme, inspired by vintage Indian batiks and tapestries, exudes grace and sophistication. 6 color palettes are available so you can choose the one to fit your mood, office or season. Built into the theme are our normal treasure trove of customized social networking icons, automagic Twitter hovercards for @usernames and configurable tweet displays, and social bookmarking options on posts. The theme is optimized for readability and includes built-in WordPress post thumbnails, custom nav menu and widgetized sidebar and footer.

Continent

Unique layout Theme call Continent WordPress Theme.

ChildThemes for ClassiPress

ChildThemes for ClassiPress, the most popular and widely used classified ads software for WordPress.

Thematic

Thematic is a free, open-source, highly extensible, search-engine optimized WordPress Theme Framework featuring 13 widget-ready areas, grid-based layout samples, styling for popular plugins, and a whole community behind it. It’s perfect for beginner bloggers and WordPress development professionals.

Erin’s sketchbook

erin’s sketchbook is a minimal WordPress theme we built for ourselves a couple years ago. It’s designed to be a good theme for art or photography, using a black background and minimal design to draw attention to the art or photography. It was based on another theme we did before that, Simple Black which, like Simple Gray, was a minimalist blog theme based around Kubrik. Since the two were closely related, we combined them, offering a theme options page to choose which style you prefer. We also added Twitter @anywhere hovercards, WordPress 3.0 menus, installation notes, and Google’s Droid Sans web font.

Skybox

Beautiful full screen theme. Perfect for portfolio, photography and boutique sites.

Color Garden

Color Garden is a free theme released on Museum Themes under the GPLv3. This theme is jam-packed with features, from WordPress 3.0 functionality to Twitter integration. Color Garden uses WP3.0′s custom header option, and comes with 4 unique headers that accent the 4 color palette options available on the theme options page. We’ve also built in custom menus, custom backgrounds, and post thumbnails, hitting all the bases for cutting-edge WordPress functionality. If you use Twitter, we’ve got you covered there, too, integrating Twitter’s new Tweet button into our existing social sharing block on single post pages and providing options to display your latest tweets in the sidebar or the footer. The footer and sidebar are completely widgetized, and the footer has three distinct columns to add widgets. If that wasn’t enough, we’ve embedded a custom typeface in the header using CSS font-face. Each color palette has its own unique stylesheet, so you can easily use this theme as a framework or build child themes (or skins) for it.

Hybrid Core

Hybrid Core is a WordPress theme development framework for creating solid parent themes. It allows theme developers to forget about all the complex functionality and dive straight into coding their theme’s HTML, CSS, and JavaScript.

This framework’s code is completely free and open source. You can use it for creating publicly-downloadable themes, client work, or even a commercial theme business.

Geneva

A clean, simple grid-based portfolio theme that displays your posts in attractive thumbnails.