This is a good toolbox for those in the online content creation game. I like being able to check out the competition, see what's working for them, and understand how they're getting traffic. The team has always been responsive and they've rolled out a number of new features since I joined.
Some of the key features I often make use of:
Brand backlinks
Brand keywords
Brand competitors
Brand top pages
(all for learning about a website, e.g. their backlinks/keywords competition and top pages).
They've also got an expired domain hunter, check a website and see which domains they link to that are expired so you can pickup the domain and either spin up a new site or redirect to an existing site.
There's loads more, still exploring what this can do and the new features.
Branalyzer Brand's Instant Analyzer