Drupal Block Builder is module for Drupal 7, it helps you create awesome blocks with just drag and drop. doesn’t matter which theme you are using. Work for both Bootstrap theme or non Bootstrap Theme.
Checkout the demo: http://dev-block.pantheon.io/ username: demo pass: demo
See video how to install and use : https://www.youtube.com/watch?v=EElBIJhmj7o
