Forums >Gears and Wears>Software for Gamin Forerunner 305.
Future running partner.
Former runner
Ross
One of the favorites mentioned around here is Sport Tracks. I'm not sure about exporting to Excel, but it does have some good graphing features. Plus it's free. You didn't mention your computer type, so I'm assuming PC. If it's a Mac, some of the Mac peeps will probably recommend one.
I haven't found one for Mac yet. I miss SportsTracks. Wish they'd Macify that.