Hi Brett,
Woo rank has been around a longtime and has many users, however there are many other options including MOZ that offer so much more.
However for a FULL SET OF SEO TOOLS and project management system take a look at MarketBandit.com. It has everything that all the BIG names have, has a client management system that far surpasses anything I have seen, is more affordable than all others, is cloud based responsive, and is US based so you don't have IP's hitting your site from foreign countries unrelated to your niche.
I have had this in Beta for the last 5 years and it launches this next week!