Office for Tablets - Get Microsoft Office on your Android tablet
Zulip - Chat for distributed teams. Zulip combines the immediacy of real-time chat with an email threading model. With Zulip, you can catch up on important conversations while ignoring irrelevant ones.
WikiSuite - While Wikipedia is the broadest unified body of knowledge, WikiSuite is the most comprehensive and integrated Open Source enterprise solution.
Flow - Stop managing projects from your inbox.
Office for Mac - Microsoft Office 2016 for Mac
Chatfully - Chatfully is one place for every chat.