Instagress - Instagress is automation software for Instagram.
TweetDeck - TweetDeck is your personal browser for staying in touch with what’s happening now.
Instagram Analytics by Socialinsider - Get better at Instagram marketing by studying competition
Twitterfall - Twitterfall is an excellent choice if you want something basic, free and without much branding.
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.
Fenice - Read writing from Fenice for Windows on Medium. Fenice (fka Project Blue Dog) is a full-featured Twitter app for Windows designed to offer the best Twitter experience to every user (pro or casual ones).