Buffer - Buffer makes it super easy to share any page you're reading. Keep your Buffer topped up and we automagically share them for you through the day.
Grum - Post on Instagram from your computer!
Sociality.io - Sociality.io is an all-in-one social media management platform for agencies and brands.
Postedo - Simple Instagram scheduler that publishes for you
Social Insider - Get an inside view of your competitors' Facebook activity
Magic Likes for Instagram Stat - Magic Likes for Instagram Stat is a social app by Fraoula that comes up with intuitive features to help you with your Instagram account.