Avanti theme has a built-in:
Unlimited possibilities to change the color, background color, pattern of almost every element or the area
7 Predefined color variations.
One click switch between strecheched and boxed layout.
4 built-in sliders (Revolution slider inclusive).
13 custom widgets
3 build in sliders
Custom animated widget for slideshow area (7 styles included)
Multicolumn skinable menu
Custom post types for sliders
Support for custom post formats (image, video, audio, aside, quote, chat, link)
Sophisticated, well organized , fully rebrandable admin panel with a lot of options
Shortcodes generator built in WYSIWYG editor
Custom SEO support
Widget logic system (you decide which widgets will be displayed on which pages)
Support for Opengraph
Google Fonts and FontsSquirel Support (4 additional font@face fonts)
Over 700 icons in different styles
Translations ready (.po file included)
…and much more