DealRoom - M&A Lifecycle Management Software

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.

SMASHDOCs - Web application for easily and quickly writing and reviewing documents within or between enterprises.

Airborn - Create and edit documents online without sacrificing your privacy

Just Social - JUST SOCIAL provides all the collaboration tools like enterprise social network, real-time document collaboration

Bit.ai - Bit is a smart real-time document collaboration platform for teams to create interactive documents, manage digital content and track document insights.