From what I've heard, the Sports Tracker-crew is currently deciding whether they shall continue to develop the N9-version of Sports Tracker or not. Currently it's a "light" version compared to the Symbian, Android and iPhone versions. It seems like most resources are on Android and iPhone nowadays, but Sports Tracker was born at Nokia and developed for Symbian and later a light version for N9 was made available.
I did contact them by email two times. The first time they said they didn't have the resources currently to develop it further and the second time they said they still debated whether they should continue to develop it or not.
It's the only sport tracking app that we have for MeeGo Harmattan. Some have suggested that they should open source the code for MeeGo Harmattan, but that would of course never happen. I think the best way is to show that we care.
For developers that searches for projects it might not be a bad idea to show Sports Tracker you're available by sending them your CV....if they decide to continue support the Harmattan version they'll already have you in mind