Influencing the social signals through brand mentions: Brand mentions or online citation is reckoned as an important factor to leverage the social signals for SEO. The links that got generated through social media are no-follow links that do not affect the SERP rankings. But when any source content is shared, commented, tweeted, or cited socially with or even without these implied links, it must funnel to highest rankings. This entire process of back-linking through social media is called social media optimization.
A lot of really awesome tools on this list. A few that I wasn't aware of that I can now add to my arsenal. I've come across a really great tool for anyone that uses a lot of different channels for paid marketing, called Funnel (funnel.io). It eliminates all the tedious time that it takes to aggregate all of your spending data. They currently support integration with more than 400 advertising sources and you can either use their built-in dashboards for analysis or export to a data warehouse, BI tool, or even Google. It's an amazing time saver for anyone who has ever spent an insane amount of time gathering data that seems to be outdated even by the time you've gotten it all together. Might make a nice addition to the list!