Ascent Activity Tracker
Ascent is a software activity tracker for the Mac. It is a software application costing $40. It allows you to display, organize, and analyze exercise activities. A novel feature is that Ascent will accept data from Garmin and Polar devices, and animate it -- showing you statistics across a given running or cycling path, such as your speed across the given run or cycling trip.
There is also an iPhone app available.
The forums show the last post form the author at 5/2010, with posts not responded to in 12/2010 asking if the software is still supported.