CollarBiz is a free theme for WordPress created by sharkthemes.
CollarBiz is a well designed multipurpose theme, especially for business and corporate sector websites. It is blazingly fast, extremely light-weight, search engine friendly and very easy to use. CollarBiz theme has wide list of customizable features including front page customizable sections with customizer api, multiple layouts and many more options. CollarBiz helps you use that technology to your competitive advantage. It comes with cross-browser compatibility, mobile friendly design and responsive features.
(Description "CollarBiz" Theme from wordpress.org)
You can download CollarBiz for free via the provided download link and include it into your themes folder of your WordPress installation. Also you can directly search for it in the WordPress admin interface in the themes section and install and activate it from there.
More information, screenshots and reviews of CollarBiz Theme can be found here.