(I thought some people here would be interested in this. My apologies if you think this is spam.)
Opera is celebrating their 10-year anniversary, and they are giving free registration codes. For Windows, Linux, Mac, Sparc, FreeBSD, Solaris.
Here's the text from the page:
SURPRISE!!! Free registration codes
Get it from CNET Download.com
Party favors: Get a free Opera registration code by clicking the "go free" button below. We're giving away registration codes for as long as the party lasts!
Here's the page link: