A Wordpress starter theme called _s, or underscores. A theme meant for hacking so don't use as a Parent Theme.
When those Wordpress (or else) theme CSS files take time to update in the browser. This should maybe be added to all themes.
Like the title says, regenarate Thumbnails after you've changed the settings (size) of it in the option-media.php panel.
The scroll kit plugin allows you to completely transform the visual appearance of an individual wordpress post or page.
This plugin lets you use images to replace the titles of your posts.
http://wordpress.org/extend/plugins/ttftitles/