Comments working on posts, news, blog or forum pages systems, when you are registered user.
Links, images or posts slider with multi options systems.
Links, posts or images carousel.
Responsive styles for tabs, mobiles and other devices.
Facebook, VK, Google Plus, Twitter, LinkedIN etc.
Google Map or Yandex Map.
Group widget with settings on page or on sidebar.
This site look something like a business card site, it also has a promotional guide, but it is much more specific and serious. Promo sites use to advertise a specific product, service or devote some one-time events (concerts, exhibitions, festival) or promote a particular brand. The whole trick here is that the promo-sites have a definite period of use and his job during this time to lure more customers or members. Therefore, they use bright, eye-catching design, different visual effects and high quality written texts. Overall, I think the meaning is clear, of course, such sites will be more complex and costly, but they justify themselves.