Mathoverflow is a website where mathematicians can ask each other questions. I am an active member and have found it quite useful.
In my opinion, one of the best sources for learning algebraic geometry from a scheme-theoretic point of view is Ravi Vakil's notes.
These are the webpages of my home church and the church I attend in Chicago. I am also an active member of the Graduate Christian Fellowship.
As an undergraduate, I sang for four years in the Duke Chapel Choir, and for three and a half in the a cappella group Something Borrowed, Something Blue.
My father, an artist, has written a book on drawing, for which I provided a few computer-generated images.