Zeplin - Collaboration app for UI designers & frontend developers
Telegram - Telegram is a messaging app with a focus on speed and security. It’s superfast, simple and free.
Abstract - A secure, version-controlled hub for your design files
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.
Pamela for Skype - A versatile and easy to use Skype audio and video recording software. Features
Signal - Fast, simple & secure messaging. Privacy that fits in your pocket.