There are quite a few pure ruby gems to deal with excel files with various degree of success. This gem's approach is to use powerfull software like Apache POI and simply provide ruby like interface.

Assign random pairs from a google docs spreadsheet

Princess is an Excel and Excelx spreadsheet reader

Rails Engine where importers can be defined for massive spreadsheet/csv load of data, based on your needs

Roo::Google extend Roo to support google spreadsheet files.

Convert Excel or Spreadsheet to Ruby hash

A gem to read google spreadsheets

A gem for simply rendering xls.

Apppend rows to a Google Sheets spreadsheet. Uses Google Sheets API v4 with server-to-server authentication

Simple spreadsheet implementation

Convert vocabularies created in a spreadsheet template to SKOS.

Spodunk stands for "spreadsheet" + "podunk"

Convert SpreadSheet documents to json following some conventions.

Read and write Google Spreadsheets like records

Get a report and write it in a google sheet.

This gem builds PostgreSQL databases from .matrix files and metadata spreadsheets

Library to convert spreadsheets, microsoft xl, csv like documents to json

Push command to Google Spreadsheet

Provides an easy way to add model-based validations to excel files.

the easy way to append data to a google drive spreadsheet