Group items tagged

While working at different Drupal projects at Propeople we often have the task to display the same content on the site in different formats - without custom templates or using views. The simplest solution is view modes. What is View Modes? View modes are named ways of displaying entities.

It is a very common usecase to display a list of nodes on a page, and one or more blocks that give you the ability to filter by tags or categories. You might encounter such a use case on a "blog posts" or "event list" page. And it would be nice if the filtering wouldn't require a full page reload, but rather just inquire the server for new information, and update the list of content via AJAX.