Sleep as Android
Sleep as Android (free - $3.00 for sleep tracking) is an app that helps users optimize sleep by tracking movement at night, hours of sleep, and waking them gently.
Sleepbot (free) is a very powerful and feature rich sleep analysis app for Android.
SleepRate is a sleep monitoring app for Android that uses heart rate as a key measure of sleep quality and is known for its great dashboard summaries.
Sleep Better (free or $1.99 for full version) is an app made by Runtastic that helps users easily analyze sleep based on the day's events.