OfficeLabs and LibreOffice
OfficeLabs is a fork of LibreOffice. The office application you open is LibreOffice with the OfficeLabs assistant added to it. It is built on the LibreOffice 26.8 development line and is licensed under the Mozilla Public License 2.0 (MPL-2.0).
OfficeLabs is an independent project and is not affiliated with or endorsed by The Document Foundation. LibreOffice is a trademark of The Document Foundation.
Your files stay normal ODF and OOXML files. Documents you save in OfficeLabs open in LibreOffice and in other applications that read those formats.