Bit.ai - Bit is a smart real-time document collaboration platform for teams to create interactive documents, manage digital content and track document insights.
Zeplin - Collaboration app for UI designers & frontend developers
Google Docs - Create a new document and edit with others at the same time -- from your computer, phone or tablet. Get stuff done with or without an internet connection. Use Docs to edit Word files. Free from Google.
Pamela for Skype - A versatile and easy to use Skype audio and video recording software. Features
Airborn - Create and edit documents online without sacrificing your privacy
ActiveWords - Auto correct on steroids