Open Office is a free Open Source, community developed software. It allows you to open and edit Microsoft Office documents like Microsoft Excel, MS Word, MS Publisher, MS Powerpoint and more. This means you do not need to purchase any expensive Microsoft licenses for your business or home use.
It is available in many languages and is compatible on all common computer operating systems, Eg; Microsoft Windows, Mac, Linux. As mentioned above, Open Office is released under the Apache 2.0 Licence. This means you may use it for any purpose - domestic, commercial, educational, public administration. You can download and install it on as many computers as you like. You can also make copies and give them away to your friends, and family. For the latest version, please visit the official Website.