A fast Excel 2007/2010 (.xlsx) file parser that returns a collection of Matrix objects

Makes it easy to import spreadsheets. Handles .csv and .xlsx formats as well as raw 2D arrays

Generate localizable strings from xlsx file.

Upload xls, xlsx and csv files and import the data in rails models.

Convert from a simple hierarchical-tree outline text into ugly xlsx file

Generate axlsx object of an any class. After you can generate xlsx file, or change axslx object.

Scan and replace text in xlsx file

Extensions for ruby-filewatcher, like xls, xlsx

if ssconvert from gnumeric is installed it can convert xls and xlsx as well (single sheet)

Bayonet is a Microsoft Excel write-only gem that reads and produces XLSX files. It's strength lies in the fact that it's able to open bigger Excel files (even with macros!) -- and write cells without touching the rest of the Excel file.

Creek with image read from xlsx feature for Creek 1.1.2.

Create XLSX files from scratch using Ruby

Meta Reports provides a meta language and data structure to create a 'meta' report. This report can then be exported into any format desired. MR provides HTML, PDF, and XLSX exports built in.