[mothered]

I think tools are made for different purposes and needs, so basically  I can't have a favorite tool since you need to use them for specific tasks.

I seldom use tools during my exploitation, but In terms of vulnerability assessment, Acunetix does the job well.

thank you for both of your input.  

On a similar note I would suggest learning about nmap

Absolutely.

Nmap/Zenmap Is a very powerful tool, and should be part of everyone's network tool set. I also like the fact It's open-source.