"Recently the makers of the free-as-in-cost iPhone jailbreaking
utility PwnageTool discovered that someone was reselling their
creation--without permission, under a new name, and for profit.
That's a situation no software developer wants to be in, but the
PwnageTool team was in an even tougher position because of the
license under which it released its code. It didn't have one.
"What the reseller did is flat-out illegal, of course;
PwnageTool is protected by its creators' copyright, period. No one
who downloads it has any right to modify or redistribute it without
permission..."