Name:tailwind (Free trial)
URL:https://www.tailwindapp.com/
Utility:This tool – 

• Saves time with bulk image upload, drag and drop calendar, multi-board pinning, pin looping, hash-tag lists and other short-cuts
• Automatically optimizes Pinterest and Instagram schedules based on when the audience is most engaged 
• Deep analytics and insights allows see what’s working and what not
• Helps reach more of the right people by having the best Instagram hastag automatically suggested by the Hashtag Finder
• Publishes all the posts, videos and stories to Instagram and Pins to Pinterest with a single workflow
• Imports the best performing Pins and republishes them at the right frequency and at the right boards