Hello Nick,
If by "Communicator", you mean the small window that allows you to do GPIB Reads, Writes, and Queries from within Measurement and Automation Explorer, then all of these utilities (IBIC and Communicator) are available without having LabWindows/CVI or LabVIEW. They ship with the NI-488.2 Driver and you can access them independently of NI's development software from within Measurement and Automation once you install 488.2 (the driver for all our GPIB Boards).
Hope this helps.
Scott
Applications Engineer
National Instruments