ConQuest DICOM server is described as 'This is the ConQuest DICOM server version 1.4.14. Date of this release: 20080902.This server has been developed within the E.U. ConQuest project as a small image archive'. There are three alternatives to ConQuest DICOM server for Windows, Linux, Mac and Self-Hosted solutions. The best alternative is Orthanc, which is both free and Open Source. Other great apps like ConQuest DICOM server are ClearCanvas Team Edition (Paid) and dcm4chee (Free, Open Source).
dcm4chee is an Image Manager/Image Archive (according to IHE). The application contains the DICOM, HL7 services and interfaces that are required to provide storage, retrieval, and workflow to a healthcare environment.