For Changing the World:

Blood:Water Mission
Invisible Children
TOMS Shoes
H2O Runners: Run A Better Story

For Williams Syndrome:

Williams Syndrome Association
Williams Syndrome on Facebook
Williams Syndrome on Twitter

For Couponing:

Southern Savers
Coupon Clippers

For Disney Planning:

Disney Parks Blog
Easy WDW
The Disney Food Blog
Kenny the Pirate

For Homeschooling:

Confessions of a Homeschooler