LibreOffice is the free, power-packed, Open Source personal productivity suite for GNU/Linux, Macintosh and Windows distributions, which provides you with six (6) feature-rich applications for all your document production and data management needs:

What does the app contain:
The Writer word processor, the Calc spreadsheet, the Impress slide presentation application, the Draw drawing/painting program, the Math formula and calculation management program, and finally, the Base database application.
Free Support and Documentation are provided by the huge and enthusiastic community of users, by the various contributors and, of course, by the developers themselves. Even you, too, can participate!
The company has just officially announced the release of LibreOffice 5.0.6. Those who want the new application can download it from the links at the end of the post.
Notes:
When installing LibreOffice, you will have to download and install the help files separately. It may sound annoying, but the help files are not that important. In conclusion, you can avoid installing them if you do not consider them necessary.
Download the application (select language and platform from the official website which you will find in the link below)
