Make My Persona - A free buyer persona generator
Adalyz - Compare Your Google Adwords Vs Facebook Ads Vs Instagram Ads and decide where to put your money. Powerful analytics and reporting for your ad campaigns.
Owlead - Grow your Twitter with valuable followers, effortless
Twitter Audience Insights - Loads of info about your followers, their interests, & more
AskAdStage - Report on & pause search & social ad campaigns from Slack
Foller.me - Real-time audience analytics for any Twitter profile