My Fitness Pal - http://www.myfitnesspal.com
Great free (online) tool for tracking your diet and exercise efforts!
RunKeeper - https://runkeeper.com
GPS Running, Walking, Cycling, Workout, Pace, and Weight Tracker. Free version is robust; paid version offers additional tools.
Pacer Pedometer - http://www.pacer.cc/
Pedometer plus Weight and BMI Management and Blood Pressure Tracker.
FitStar Yoga - http://fitstar.com/
FitStar Yoga creates personalized workouts to help you increase flexibility, lose weight, and reduce stress.
Map My Fitness - http://www.mapmyfitness.com/
Your workout, your device, anywhere, anytime. Plan, track, analyze, and share your journey with MapMyFitness.
CycleMeter GPS - http://abvio.com/
Cycling, running, and mountain biking tracking with maps, graphs, splits, intervals, laps, announcements, zones, training plans, and more.
Pact - http://www.pactapp.com/
Earn cash for living healthy! Make a weekly Pact for eating more fruits/veggies, logging meals, or exercising. At the end of the week, earn cash rewards for making your goals, paid by members who don’t quite make it.
EndoMondo - https://www.endomondo.com
Turn your phone into a personal trainer! Endomondo tracks duration, distance, calories, and more in real-time, offers audio feedback on the way, and lets your friends peptalk you live while you’re exercising.