Both the Java Evil Popups and the more recent SQL Injection Toy posts have been followed by kind requests to see the code.
Furthermore, I routinely receive inquiries about the source code of my most known Firefox extensions (NoScript and FlashGot), sometimes from people graciously accusing me of infringing the GPL which covers both.
I believe the time has come to make them all happy, but...
Disclaimer
True hackers won't read further, because the info above is more than enough to obtain all the mentioned source code in a few seconds ;)
(more...)