Edit to Add: I am not a lawyer, I don't play one on TV, nor do I pretend to be one on the internets.
From the Copyright Act:
A “derivative work” is a work based
upon one or more pre-existing works,
such as a translation, musical
arrangement, dramatization,
fictionalization, motion picture
version, sound recording, art
reproduction, abridgment,
condensation, or any other form in
which a work may be recast,
transformed, or adapted. A work
consisting of editorial revisions,
annotations, elaborations, or other
modifications which, as a whole,
represent an original work of
authorship, is a “derivative work”.
In English, from Wikipedia:
A derivative work pertaining to
copyright law, is an expressive
creation that includes major,
copyright-protected elements of an
original, previously created first
work.
None of those that you've mentioned would be derivative works because your completed product has nothing in there that is under someone else's copyright nor was it based off of someone else's copyright. -- Tools used, however, are fine.
A side example:
In a previous lifetime, I used to create audio books and sell them on Ebay. I was sent a cease-and-desist order for selling audio versions of CS Lewis books. Even though what I was selling was original, it was based off of copyrighted text, and therefore it was a derivative work.
