The Catalog fo Jira app can be used in any Jira reduction: Core, Software, Service Desk.
Jira Service Desk
The app allows using the Catalog Select field on Service Desk Portal as a usual select list.
HelpDesk for Jira
The app is compatible with HelpDesk for Jira plugin: you can allow your customers to select, browse and manage the Catalog entries the same way as in Jira.