Interfacer - Collection of more than 200+ free design resources
NumWorks - The graphing calculator that makes learning math easier.
Facebook - Connect with friends, family and other people you know. Share photos and videos, send messages and get updates.
Learney - Knowledge aggregator for developers
Freebiesbug - Collection of the best free web design resources.
eMathHelp.net - Site is created to help people learn math. Includes algebra, calculus, differential equation calculators and notes with many examples.