Coverity Scan - Find and fix defects in your Java, C/C++ or C# open source project for free
Zoom - Equip your team with tools designed to collaborate, connect, and engage with teammates and customers, no matter where you’re located, all in one platform.
SonarQube - SonarQube, a core component of the Sonar solution, is an open source, self-managed tool that systematically helps developers and organizations deliver Clean Code.
Telegram - Telegram is a messaging app with a focus on speed and security. It’s superfast, simple and free.
Embold.io - Peer Code Review
WhatsApp - WhatsApp Messenger: More than 1 billion people in over 180 countries use WhatsApp to stay in touch with friends and family, anytime and anywhere.