Fitbit has everything I need, the steps, the Heart Rate, it has all of my exercising modes, and it has a fair price. It has a rather simplistic User interface, which I really like to be honest. Highly recommened!
Strava - The #1 app for runners and cyclists
Tasker - Tasker is an application for Android which performs Tasks (sets of Actions) based on Contexts...
Lose it! - Snap a photo of your food to get nutritional facts
AutomateIt - Automate Your Android!
Workouts by Muscle Booster - Workouts by Muscle Booster is an app that provides you the home as well as gym workout plans.
LIama - LIama is a Location-Aware Mobile app that determines your location and helps you do lots of other stuff with ease.