JVS DICOM Server is an open source PACS that can act as a Storage Service SCP and as a Query/Retrieve Service SCP. Pixel data can come either from image files, or a JPIP reference for JPEG2000 virtual slides. It is written in C++ and based on the DCMTK toolkit.
JVS DICOM Workstation acts as a Query/Retrieve Service SCU and a Storage Service SCU. In addition to acting as a radiology workstation, it opens an external viewing application when it receives a JPIP reference to a JPEG2000 virtual slide.