office

Parse office documents (doc, docx, xls, etc..)

node-office

Parse office documents (odt, doc, docx, ods, xls, etc..)

xlhtml, unoconv

$ npm install office
var office = require('office');
office.parse('spreadsheet.ods', function(errdata) {
    console.log(data.sheets);
});

See test dir for more examples.