Name: LibreOffice

Platform: Windows, Mac, Linux

Download Link: www.libreoffice.org

Description:
LibreOffice is a free office suite of applications. LibreOffice is a cousin to OpenOffice and is similar to MS Office.

Writer is the word processor.
Calc is the spreadsheet.
Base is the database.
Impress is the presentation software.

LibreOffice works on Windows, Mac and Linux.