It has LibreOffice and more. Read why I use it at https://www.howtogeek.com/201354/ninite-is-the-only-safe-place-to-get-windows-freeware/
It opens Excel 365 sheets for me.
I need to be able to read Excel files sent to me. My old reader was lost when I bought a new computer and I don't want to download one with a lot of junk attached. Is there a nice clean free download available and where would I find it?