You can use the HTML element (Add an Element> HTML) to add various features and widgets to your site. Below are a few examples you can use.
http://business.pinterest.com/ - All the option Pinterest offers including tips for business owners and customized pins.
http://business.pinterest.com/widget-builder/#do_pin_it_button - Creating a pinterest button for your site.
Add a widget to inform your visitors of your Yelp presence - https://biz.yelp.com/blog/how-to-get-yelp-bling
Add widgets to display information and reviews on your business - http://www.tripadvisor.co.uk/WidgetEmbed
Add a badge with a link to your Instagram photos - http://instagram.com/accounts/badges/
* Make sure your profile is public, or the photos will not be displayed.
You can embed a Google Calendar to your site by following instructions at https://support.google.com/calendar/answer/41207?hl=en
Add a comment Box to your site so visitors can leave a message - http://www.htmlcommentbox.com/
Password Protect / Login
e-zee INTERNET Counter
Add a counter to your site to keep track of the number of visits to your site - http://www.e-zeeinternet.com
Add OpenTable reservations to your website. For Restaurants, cafes and bars - https://www.otrestaurant.com/marketing/ReservationWidget