Ruby version of the calculations from various books like Celestial Calculations by J. L. Lawrence, Practical Astronomy with your Calculator or Spreadsheet by Peter Duffett-Smith and Jonathan Zwart, or Astronomical Algorithms by Jean Meeus

xlsx spreadsheet generation with charts, images, automated column width, customizable styles and full schema validation. Axlsx helps you create beautiful Office Open XML Spreadsheet documents (Excel, Google Spreadsheets, Numbers, LibreOffice) without having to understand the entire ECMA specification. Check out the README for some examples of how easy it is. Best of all, you can validate your xlsx file before serialization so you know for sure that anything generated is going to load on your client's machine.

Use GrabzIt to convert HTML or URL's into images, PDF, videos, rendered HTML or DOCX. These captures have highly customizable options include altering quality, delay, size, browser type, geographic location and much more. Additionally GrabzIt can even convert HTML tables on the web into a CSV or Excel spreadsheet. As well as enabling online video's to be converted into animated GIF's.

Bespoke tool for generating spreadsheet templates from Sample Types for use with SEEK.

Takes a stream to a spreadsheet file and produces an XML or CSV representation of its contents

Spreadsheet loader for RgGen register map.

Roo can access the contents of various spreadsheet files. It can handle * OpenOffice * Excelx * LibreOffice * CSV

As of version 0.6.0, only Microsoft Excel compatible spreadsheets are supported

View spreadsheet files in a text-console.

Xsv is a fast, lightweight parser for Office Open XML spreadsheet files (commonly known as Excel or .xlsx files). It strives to be minimal in the sense that it provides nothing a CSV reader wouldn't, meaning it only deals with minimal formatting and cannot create or modify documents.

Google Spreadsheet fetcher

Importance allows users to upload spreadsheets in any format and lets them select how the columns should be imported.

A programming language built on top of CSV. You can define functions and variables to use in your spreadsheet, then compile it to Excel, CSV, Google Sheets, etc.

NOT WORKING CODE. Designed to make it easy to take a spreadsheet or other tabular data and use it to generate, manipulate, and style connected graphs. Can be used from the command line or as an object model. This gem does not itself perform any rendering, although it contains facilities to drive the Graphviz familly of open source tools to generate images (e.g. gif, jpg, svm).

Quick Personal Expenses Planner - for people too lazy to use a spreadsheet or finance app.

Allows you to program spreadsheets using .rxls views

col_active_importer_starter makes full use of active_importer gem to import tabular data from spreadsheets or similar sources into Active Record models.

a time tracking solution based on spreadsheets

Spreadsheet Architect is a library that allows you to create XLSX, ODS, or CSV spreadsheets easily from ActiveRecord relations, Plain Ruby classes, or predefined data.

Build clean and maintainable styles for your axlsx spreadsheets. Build your spreadsheeet with data and then apply styles later.