Open Office and Libre Office –Base
Zoho – Creator
Zoho - Planner
Zoho – Notebook
Mozilla – Thunderbird
Windows Live Mail
There is a version of Microsoft Office for Macs and an ios app as well.
iWorks is on Mac and ios devices as well as coming to icloud on the internet.
Word Perfect is still around as well.
There are also office apps like QuickOffice for smartphones and tablets
Places you can save your office documents to