Astronomy Picture of the Day A neat place with something new to look at everyday.
Encyclopedia of Astronomy and Astrophysics A searchable database of Astronomy information
ADS: Astrophysics Data System Essential for all your Astronomy paper needs
ADS: French Server Often usable when ADS is down
BOSS (The Baryon Oscillation Spectroscopic Survey) Public Release
Astronomy Meeting Database

Doodle A neat scheduler for large groups
Wordle Neat tool for making word clouds