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.

Spreadsheet loader for RgGen register map.

A VERY simple Ruby SpreadsheetML API

It takes a CBHPM Excel spreadsheet file and give convenience methods to deal with it.

A library to select rdb data and update spreadsheet using it.

An engine for importing spreadsheets (or `ActiveResources`) into a Rails app, easily.

Reads hours from a Google Spreadsheet and generates a PDF invoice.

Rails asset pipeline for tiny editable jQuery Bootstrap spreadsheet

Rails Excel strategy using spreadsheet gem

csv_rb provides an csv renderer so you can move all your spreadsheet code from your controller into view files. Now you can keep your controllers thin!

A Data Viewer for RedAmber. Opens a window and displays a spreadsheet-like table.

roo can access the contents of OpenOffice-, Excel- or Google-Spreadsheets

A ruby library for extracting spreadsheet data from Google Drive. Performs a custom ETL procedure on each row.

Transform an Array or Hash into a excel file using the spreadsheet gem.

Workbook_Rails provides a Workbook renderer so you can move all your spreadsheet code from your controller into view files. Partials are supported so you can organize any code into reusable chunks (e.g. cover sheets, common styling, etc.) Now you can keep your controllers thin!

Pulls a Google Spreadsheet into a CSV

Assign random pairs from a google docs spreadsheet

Given an hash of possibles header label find the correct position of a column in the real header. Useful when you don't know the structure of a spreadsheet.

Simple spreadsheet implementation

Allows you to use Socialcalc, a JavaScript-based spreadsheet, on Ruby on Rails web applications.