Frankly, I end up using Microsoft Word a lot just because I know I’m going to send the document to someone who has Word.  However, when I can, I use OpenOffice.  OpenOffice was owned by Sun Microsystems, but since Sun was bought by Oracle, it’s now part of Oracle.  Oracle seems like they are not interested in continuing this project, so another group has taken it on and renamed it LibreOffice.

As of this writing, I do not know if OpenOffice and LibreOffice will become two separate forks or if OpenOffice will stagnate while LibreOffice takes over.