Buffer for Instagram - Plan, track, and analyze your Instagram marketing
TweetDeck - TweetDeck is your personal browser for staying in touch with what’s happening now.
Instagram Analytics - Professional Instagram analytics
Twitterfall - Twitterfall is an excellent choice if you want something basic, free and without much branding.
Direcon - Instagram Management Tool - Drive growth at every stage of your Instagram account.
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).