FlySight viewers
From FlySight
Several viewers are available for FlySight data:
GPSBabel
GPSBabel can be used to convert FlySight files to other formats, including KML files which can be read into Google Earth.
Excel add-in
Finally, for users who want to do their own analysis, Andreas Hellström has developed an Excel add-in which formats the FlySight data and adds charts, additional columns of data, Google Earth files and loads of other stuff.