Check out Pulitzer Prize winner Bill Dedman's Powerreporting.  The stockpile of information is amazing and neatly arranged.  You can spend hours educating  yourself on anything from government to families to statistical data.  No matter what your job or interest, Bill's got the link for you.

Vocations.com.  I love this site because it reminds you that vocations are more than religious life.  Life is a vocation.

Absolutely EVERY calculator you could ever need from Martindale's. Nearly 23,000 calculators in several languages from knitting to physics.

How much pollution is in your community?

A Gadzillion Things to Think About