Map My Walk: My Favorite App
Track Your Steps Online: Pedometer
For iPhone Users: i Health
For Android Users: Best Fitness Apps For Android
The 25 Best Fitness: Rated By PC Mag
Making Working Out Fun: Fun Fitness Apps
iTunes Apps: iTunes Users
Apps That Offer Rewards: Incentive Apps
Overall Fitness App Awesomeness: From The NY Times
Here are a few screen shots from my own walks on i health and mapmywalk: