It was nice to see today that the custom tag that I built for CMS Made Simple has exceeded 4000 downloads.
Random Global Content Blocks enables the template editor to specify a range of content blocks to show and then the tag does the work of deciding which one to display per page load. It even supports a regular expression syntax so as long as a given naming convention is adhered to new items can be added through the CMS without the need for template modifications.
This would mean that any global content block starting with the name starting case_study_ would be included in rotation, randomly.
You can download the tag here or read more about Siftware’s CMS Made Simple installation and customisation services.