As Chris said, LibreOffice has better support. It's available for Windows, Mac, Linux, Android and iOS in multiple formats and languages.
OpenOffice was "bought out" by Oracle when it bought Sun (which had previously been a benefactor of the project) and is no longer completely open source. There were always closed-source add-ons for OO back in the day, but you could be assured of getting a fully-open suite if you wanted. That is no longer the case.
Most of the OO developers left in a huff and started The Document Foundation (LibreOffice makers) when the Oracle acquisition occurred.
www.libreoffice.org