Apache OpenOffice is a free software suite that serves as a open-source substitute for Microsoft Office. As such, you can use it to create a variety of business documents, including calendars.

All the templates are a standard A4 page or US letter size, and made in Microsoft Office 2010 with the office suite's default fonts. They should also work in OpenOffice and Mac Pages, but not all ...

LibreOffice has been a rather successful fork of OpenOffice.org, having now replaced its parent in nearly all Linux Distros, and has attracted quite a few developers from the OpenOffice.org ...