I work on a Drupal application which utilizes Drupal taxonomy for grouping products on the front page. A view displays an image for each product grouping, allowing users to click through and view products in the selected category.
For those Drupal devs new to submitting your own custom module to Drupal.org (as I am) you'll find a very well structured review process you have to pass first.
Responsive Layout is my new favourite field of specialization. Given how many pages are still not optimized for mobile (including the one you are just reading, but not for much longer), there is a lot to do.