Astronomy Websites
The Current Moon Phase:
http://www.calculatorcat.com/moon_phases/phasenow.php
Articles on the Night Sky:
http://skyandtelescope.com
Information on the Sun and Moon:
http://usno.navy.mil/
This shows the current moon phase and you can go back and forward days:
http://www.briancasey.org/artifacts/astro/moon.cgi
Moon Phase Calendar:
http://stardate.org/nightsky/moon