LunarSight - Accurate data about the Moon
Next Full Moon - All in one calendar to find the next full moon date
Stellarium - Stellarium is a free open source planetarium for your computer.
Solaris Sky Calendar - An astronomy calendar right in your pocket
Solar Walk - Solar Walk is a 3D model of our solar system, bringing the universe to the palm of your hand.
MOON for Android - Beautifully track the phase of the moon