SunRiseSet is a ruby class calculates the times of the sunrise, solar noon and sunset. It also calculates astronomical, naval and civil twilight times. Not sure of the origin of the algorithm. I have seen a fortran version http://www.srrb.noaa.gov/highlights/sunrise/program.txt a .pl www.mso.anu.edu.au/~brian/grbs/astrosubs.pl and .vb versions for spreadsheets too. All had the same comments, so are of a common origin.

Copies CaseBlocks Bucket Stats to Google Spreadsheets

A tool for loading spreadsheet data into ruby objects

WebGet spreadsheet_import_export_helpers gem: parsers and prettifiers for spreadsheets

Allows a user to specify a list of gaming cards in a spreadsheet, then generate a PDF suitable for print-and-play games and prototyping.

Soroban makes it easy to extract and execute formulas from Excel spreadsheets. It rewrites Excel formulas as Ruby expressions, and allows you to bind named variables to spreadsheet cells to easily manipulate inputs and capture outputs.

Generate marc records from Overdrive provided metadata spreadsheets.

Tools using roo to performa actions on multiple spreadsheets

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

Imports/exports i18n translations from/to Google Drive Spreadsheet for easier collaboration.

Spreadsheet ERB Template for Reports

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

Extend Rails capabilities of importing and exporting excel files thanks to Spreadsheet gem

spreadsheet replacement. for real.

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

Portable is a virtual document object modeling library that only contains basic writers by default. This library extends Portable and adds a Spreadsheet Writer implementation.

Convert SpreadSheet documents to json following some conventions.