Freehill Trading Co
Along with their self promoting cool sticker you will get a coupon for their web shop and a bear sticker or a mean people suck sticker or Temporary Tattoos. Simply send them a self addressed self stamped envelope. (They have lots of things that can fit in a envelope.)

Superchecks
Free fundraising kits, samples & gifts are for Jr. High & High school teachers, advisors & coaches in the US only.

Unity Life
Just fill in their address box and they'll send you a free gift (limit one per household).

Virtual Bazaar
Enter online to win free gifts every month-no purchase is required.