WPS Office
Most compatible MS Office clone I have found. From https://wps.com/.
Scribus Desktop Publisher
Incredible Desktop publisher from http://scribus.net. Slight learning curve, but very accurate and usuable program.
LibreOffice Office Suite
Freeware – this is a great office suite that is compatible with Microsoft Office files. It has programs compatible with Word, PowerPoint, and Excel. From http://www.libreoffice.org.
MuseScore Music Composition Software
Freeware – music composition software from http://musescore.org/.
OpenOffice Office Suite
Freeware – this is a great office suite that is compatible with Microsoft Office files. It has programs compatible with Word, PowerPoint, and Excel. From http://www.OpenOffice.org.