XPViewer is a standalone application identical to XPSWMM/XPStorm with the exception that the ability to Solve a model and Save changes are disabled. Files must be encrypted to be opened with XPViewer.
This provides the benefit of submitting a completed model to an agency completely.
You can download and install the latest XPViewer from Innovyze for free.
For more information about XPViewer, refer to the XPViewer help documentation.