Pathfinder Online lets you type a callsign once and search more
than 75 different sites for QSL information with a few mouse
clicks. Simply type a callsign
into the Target Callsign box and then click on one of
the search buttons; the results of this search will be displayed
in the frame
below the horizontal divider. If the search fails to yield a QSL
route, click on another search button.
http://www.dxlabsuite.com/pathfinder/WebClient/