Microsoft is taking cues from Yammer.
MS Office Suite comes to iOS for Office 365 subscribers only.
Downloads for Office Software
Kingsoft Office Suite - free
Kingsoft Office Suite 2012 is a free word processing software for Windows operating system.4.5available for : windows
Olive Office Premium - free
Bring the office to you in your Android device with Olive Office Premium.4.5available for : android
SSuite Office Portable - free
SSuite Office Portable is an excellent productivity application that runs from memory sticks or USB drives!4.5available for : windows