LibreOffice

The king has been dethroned! Well, sorta. Yes, technically the newcomer LibreOffice stomped on the former-champion OpenOffice.org. Because LibreOffice is a fork of OpenOffice.org, however, it seems like we should have an asterisk in there somewhere. Shortly after Oracle bought Sun Microsystems, OpenOffice.org was forked. The good news for users is that LibreOffice has a large dev crew, and updates and feature enhancements are coming out at a really nice rate. The king is dead; long live the king!