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.

Tools and libraries for working with metadata spreadsheets and MODS.

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.

AsposeCellsJava is a Ruby gem that helps working with Microsoft Excel and OpenOffice spreadsheets using Aspose.Cells for Java libraries

Caxlsx_Rails provides an Caxlsx 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.) You can use it with acts_as_caxlsx, placing the to_xlsx call in a view and adding ':package => xlsx_package' to the parameter list. Now you can keep your controllers thin!

Axlsx_Rails provides an Axlsx 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.) You can use it with acts_as_xlsx, placing the to_xlsx call in a view and adding ':package => xlsx_package' to the parameter list. Now you can keep your controllers thin!

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

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.

Spreadsheet loader for RgGen register map.

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

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

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.

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

Google Spreadsheet-related job classes for Bricolage batch framework

provides ability to generate excel/xls/xlsx spreadsheets from your lisp code

Google Spreadsheet fetcher

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

Exports .env file from Google Spreadsheet