Hello,
  I'm a registered researcher and I have done my research on this
matter, but I can't find anything, so this is an oportunity to me to
make my first question, here it is:

  I'm looking for a Freshmeat clone, as far as I know, the freshmeat
code is not public. The clone must be a *clone*, not something that
looks similar like this:

SourceWell
http://sourcewell.berlios.de/index.php

It could even be a modified PHPNuke, but as a good *clone* must have
the 90%+ of the Freshmeat features, the ideal solution would meet
these requeriments:
-PHP+MySQL
-GPL

If you need more information, don't hesitate to request for any
clarification.

Regards.

Try these:

e107:
http://e107.org/news.php

postnuke:
http://www.postnuke.com/modules.php?op=modload&name=Navigation&file=index

Slashcode:
http://slashcode.com/