Baker Funeral is one of the best Drupal 8 web sites that we have built at InDigiMar. A funeral home web site, that publishes obituaries. It was this project that showed us that Drupal 8 is ready for complex and feature-rich web sites.
COBI Bike is a second released Drupal 8 site that I worked on, though it was the first one I contracted. It just took longer for it's complexity. COBI Bike is an innovative Stuttgart based German company, who create apps and devices that make bikes smart. The work was to take an existing static site, very reach and front end versatile, and architecture it into Drupal relevant patterns. There was lots and lots of work done, with the COBI's new front end developer Kerim Hadri joining in to take over the front end at the latter stages.
YogaTrail is a successful international startup, a yoga listing provider. A result of work of a tea of good developers, yogatrail site relies heavily on Apache Solr for fast result search and delivery. The startup also has a cross-platform mobile app running on AJAX api that the site provides. My work on the site included Back End APIs, AJAX, Solr, and SEO, as well as some Front End work. YogaTrail belongs and is maintained by Buzzwoo, and I was "leased" to them as a helping hand from the Drupal agency arocom.
Alexander Bornyakov is running for the parliamentary seat in the 2012's Ukraine elections. The task was to theme it and build the site that includes blog and news sections, from a Photoshop design. The site was built on Drupal.