for those who want to view .rpt files but don't want to purchase crystal reports,
http://www.businessobjects.com/products/reporting/crystalreports/viewer/en/download.asp
http://homepages.udayton.edu/~groffkep/CrystalCorralInstall.msi
you can also find the whole list of free viewers at
http://www.kenhamady.com/bookmarks.html