Daily Yoga - 50+ yoga classes, 400+ workout poses, w/ HD video and music
iRewardHealth - Motivating healthy behavior change
Yoga Studio - Hours of great yoga videos or build your own
Physio Health - Stay healthy, get rewards.
Namasketch - Mini yoga session for beginners, told in doodles.
Tep - Fitness tracker meets tamagotchi. Don't starve it!