Twitterfall - Twitterfall is an excellent choice if you want something basic, free and without much branding.
TweetDeck - TweetDeck is your personal browser for staying in touch with what’s happening now.
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).
ScheduGram - ScheduGram is an ultimate Instagram Management platform that delivers everything you need to visually plan, create, schedule and analyze your Instagram posts.
SproutSocial - Sprout Social is a social media management tool created to help businesses find new customers & grow their social media presence. Try it for free.
Tweetdeckr - Tweetdeckr is an open source Tweetdeck replacement client.