Seems real to me. There was news last year that they released Flex Builder for free (non-commercial use) so that people would be able to learn a new skill set if they aren't currently working (and, of course, to promote Flex usage). I imagine the Cold Fusion tools are released for similar reasons.
I went and register for a free copy of adobe flash builder for educational use. I just wanted to know if this site is real or fake.
it's real, i did the same thing for my flex 3 licence.
and i'm currently waiting on my flash builder 4 key