Dana Epp has some comments
about Nessus's movement towards closed source. While I cannot justify
my feelings in the same manner that Dana can, I did contribute to the
project (a couple measley signatures) and feel just as betrayed as I did
with NFR and the CDDB. For each of these projects, I contributed data
to support an open community and the owner decided to profit by moving
the project away from the user community supporting it.