Tweedle App - Notion is nice but sometimes all you need is an app like Tweedle.
RingCentral - RingCentral is the leading provider of cloud-based communications and collaboration solutions for small business and enterprise companies
Plume - App for writing documents, scripts, books and more.
Dialpad - Switch is a cloud-based phone system built for Google Apps users.
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.
Aircall - Aircall is a call center software of a new generation designed for fast growing companies. Setup instantly and integrates to your CRMs