The Strava Node.js SDK by Austin Brown access the API to implement running and cycling features into applications. It supports OAuth, athletes, activities, clubs, and gear. It includes installation and additional development resources.
Web and iPhone maps provider CloudMade can add a few more platforms to that list. Today it acquired German geospatial company One Step Ahead to incorporate Android, MeeGo and other mobile platforms to its suite of developer tools. CloudMade will also incorporate One Step Ahead's offline/online map technology, which passes a few map updates at a time.