Free Alternative to Microsoft Office

We all have or had Microsoft Office in our lives.  It's a very useful set of programs to get things done.  If only Microsoft didn't charge an arm and leg for it.  For years, your alternative was OpenOffice.  Now the future for OpenOffice is in doubt, so where do you turn?  You could try LibreOffice, but it is bogged down with a clumsy, outdated interface and file compatibility has been an ongoing issue.  Well, if you are not a fan of Google Docs, try Kingsoft Office Suite.  It has three programs, Writer, Spreadsheet and Presentation.  It is fully compatible with Microsoft Office documents and has a feature that Office has yet to adopt, tabbed views for documents.  If you have multiple documents open, each one gets its own tab, just like your web browser.  This simplifies switching between documents.  There is a free version, which does everything you need.  A Standard and Professional version are also available ($50 & $70 respectively), the one feature you get with them that is not with the free version is the ribbon interface that you currently have with Office 2010.  If you are sick of Office, give it a try.