Google is offering free stickers. There's the standard Gmail m-velope — dressed up in glitter. One of three bookplate style stickers you can stick on anything from the inside of a favorite book to your laptop or your skateboard. And there's a sheet of keyboard shortcut stickers intended as a tool to help people learn Gmail's shortcuts.
You will need to enclose an international reply coupon (IRC) if you're outside of the U.S. And be sure to send your envelope in soon — one per person please.
Sorry — not really a freebie. The postage to and from would be more than the cost of the stickers. Moreover, Google posted that in December, and judging from their size and how many links that page gets, I think all the stickers would be gone by now.