CDM version of SWMM5
CDM makes available their version version of SWMM5 for download and use. There's a few more options and the GUI element edit boxes have a lot more variable options. Otherwise, it looks, feels, and acts like the EPA version (from what I've have discerned).
http://groups.google.com/group/swmm5
http://groups.google.com/group/swmm5
This version is a QA/QC version of SWMM 5 that was used to more closely compare the SWMM 4 to SWMM 5 results using extra data variables.
It should not be used for modeling. You should use the EPA SWMM Web site to download the latest EPA SWMM version:
http://www.epa.gov/ednnrmrl/models/swmm/index.htm