excel

Libre Office

LibreOffice published by the Document Foundation is a complete free office suite. It may not be as popular as other high priced office suites, but in terms of features it can compete very well. The best part is that it is completely free. When you start the program, a menu will appear. This allows you to select what program to use. The choices are Writer, Math, Impress, Draw, Base and Calc. Impress is a presentation program while Base is used for database integration.

OpenOffice

OpenOffice is one of the best reviewed and oldest in the family of productivity software suites. It takes care of all the typical office needs: word processing, spreadsheets, presentations, graphics, databases and more. The software is available for all possible operating systems and in many languages. It can open & save your files to an international open standard format and to many additional formats common to other office software packages as well. The best thing about it - it can be downloaded and used for any purpose completely free!