The term "utility" is used here to indicate scenarios that are not normal, playable scenarios. These come in two forms: utilities for players and utilities for designers. Utilities for players are scenarios designed to make it easier to play other scenarios, such as high level party makers and shopping scenarios. Specifically, the following scenarios are utilities for players:
An interesting exception is the Alternate Level Builder, which is designed both as a utility for players to make whatever sort of party they would like, and also as a utility for designers to create their own scenario-specific HLPMs out of.
Note also that the utilities for designers may not be playable. Some are, and some aren't. They're meant to be tinkered with in the editor.