SEO Tools and Moz

Hi all,
I am looking for some information from SEO experts out there.
I have been using moz.com's trial for the last few weeks. Have found it great and it seems that it really helps.
However, can someone please advise on what other tools are really required in doing SEO for multiple websites?
I know about content and fresh and unique content is required for the sites to have better SERP. Besides that what tools do we need to handle SEO for our own or someone else's sites?
Looking forward…
SEO Tools and Moz

See original post by master-mind