Hi,
I am looking for testing methods and Test execution strategies for
iterative development in particular but also for waterfall
development.

Can you enlighten me as to what 
iterative development 
and
waterfall development
are?

Are they some type of new extreem sport?

Entire books have been written on the subject of software testing. 
It's a broad topic and I suggest you seek out some of the many tomes
ont he subject.  I'll just scratch the surface with some comments:

The hallmark of iterative development is proper unit tests.  This way
you can refactor with confidence when the next iteration requires a
design change.  In C++ and Java this is usually done with CppUnit and
JUnit, respectively.

Some other things you can do are use tools like ClearCoverage to
verify what parts of your code are exercised in white box testing. 
Black box testing can be automated with something like Rational Robot,
but you still need someone to write the test scripts of course.

During development, especially during integration testing, using
something like Purify goes a long way to finding the kind of isideous
bugs that are usually transparent until the software is really
exercised fully by users, espeically memory management related bugs.

Your question is about to expire without having been answered, and you
might be disappointed.

A possible reason for that could be your pricing, which might be a bit
low for the type of research requested. Here is a link to guidelines
about pricing your question, in the pricing guide:
https://answers.google.com/answers/pricing.html - I hope this would
help you price your next questions on Google Answers.