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

Parses Excel files(xlsx) read by other file input plugins.

Fast way to read and write in microsoft office xlsx

Native Ruby gem for parsing documents (PDF, DOCX, XLSX, images with OCR) with zero runtime dependencies. Statically links MuPDF for PDF extraction and Tesseract for OCR.

Allow add JIRA worklog (hours worked) from excel (.xlsx) file via JIRA REST API

Generate localizable strings from xlsx file.

A Ruby spreadsheet parser for Excel (xlsx, xlsm).

Standardize of operation manner for reading Excel files(.xls, .xlsx).

It extracts data from exported .xlsx file of SEB bank statements and generates a financial report.

support to grep something in .xlsx files

Export your data as various types of spreadsheets. Supports csv and xlsx output.

Simple yet powerful library for importing tabular data from CSV, HTML, XLS and XLSX files, including support for auto-detecting column order, parsing/validating cell data, aggregating errors, etc.

A simple way to Open .csv, .xls, .xlsx files. You can convert it to 2D array, hash, data frame.

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.

Device Magic users can upload .xlsx files to be referenced within their mobile forms. This project is aimed at automating the same process for Google Sheets to increase the flexibility of resources.

Ruby interface to libxlsxwriter

A Ruby gem that streams and parses large Excel(xlsx and xlsm) files fast and efficiently. Based on Creek gem, but with Multi-threading and Garbage Collection

Gem for converting xslx to html

utility for reading excel file both .xls and .xlsx.

Easily output tabular data, be it in HTML, CSV or XLSX. Create clean table classes instead of messing with views to create nice tables.