Works with CiviCRM 4.7 and should work on CiviCRM 5.0 or higher
You like how tags are displayed in the contact summary? this extension does the same, for relationships.
Screenshot (click to enlarge)
Since CiviCRM 5.x, extension releases compatible with CiviCRM 5.0 are compatible with 5.0 and later. An extension release compatible with 5.25, for example, means that it requires CiviCRM 5.25 or later.