Back in 2010, the OpenOffice devs had to abandon that name for trademark reasons¹, so they renamed to LibreOffice and continued developing under that name.
OpenOffice theoretically also still exists, but it’s hardly getting updates. Unless you specifically like software from 2010 (including some security vulnerabilities, I believe), you want to use LibreOffice.
¹) The OpenOffice trademark was owned by Sun Microsystems, which got bought by Oracle. Oracle has a very bad reputation, so the devs did not care to wait around for Oracle to fuck everything up.



Yeah, have not heard about any of these problems before this post…