Multiple Companies Contact Lookup
This ACT! add-on provides the ability to lookup contacts from multiple companies. When 2 or more companies are selected in the Company List View, the Create lookup... menu item is dimmed in Act! prventing you from creating a lookup of the contacts belonging to the selected companies. This add-on adds a Lookup Contacts... menu item for that purpose.
Upon clicking it, it simply displays the lookup of contact in the Contact List View.