Softmaker this year again gives away free office suites for Windows, Linux and Android : http://www.loadandhelp.com/en/
These are highly compatible with MS Office and that’s why i use it every day.
For every download they give $0.10 for charity.
The only thing they ask is your email adress to send the license key.
This way you can help people by downloading the free Office suite from Softmaker.
PS. forgot to mention: you can use it on 3 pc’s for private or business use.