Tweetbot - Sync your timeline across your iPhone, iPad, and Mac. Mute tweets by user, hashtag, tweet source, or keywords (including regex). 3rd Party support for image, video, read later, and timeline sync services.
RingCentral - RingCentral is the leading provider of cloud-based communications and collaboration solutions for small business and enterprise companies
Twitterrific - Twitterific is an app that offers several functions and fun features for your Twitter account.
Dialpad - Switch is a cloud-based phone system built for Google Apps users.
TweetDeck - TweetDeck is your personal browser for staying in touch with what’s happening now.
Aircall - Aircall is a call center software of a new generation designed for fast growing companies. Setup instantly and integrates to your CRMs