What are microsoft excel alternatives for editing .xlsx formats which are free of cost?

Question

Open office does not support .xlsx format.I found this which is good as it very compatible to excel but it still does not support editing .xlsx format(the free versions of it).

Is there any way to get around.

Answer 1

You could use Google Docs if you wanted to use the cloud.

It's supported xlsx since 2009

A new version of Google Spreadsheets is here! Make sure to check out the following features:

XLSX import. Excel '07 files (xlsx) can now be successfully imported into Google spreadsheets, supporting cell data, formatting, formulas, font style, background color, named ranges, frozen panes, and horizontal merges. Note: there's currently no option to export files as .xlsx.

Just note that last line about exporting them though.

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Important edit

I've just checked, exporting as ".xlsx" is now supported via the "Download as" button