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

A ruby gem to export all records of any model to a xls file

Use this Rails 3 plugin to easily import data via csv files

Gives Hash the ability to be turned into csv files

This ruby gem provides simple interface to load CSV file into SQL lite object and allow simple querying

Provides controller actions, views and field mapping for data from a csv file.

Import and export a CSV file in a very easy and simple way

CsvOmg easily lets you map CSV to objects. Inspired by happymapper.

Effortlessly print enumerables as CSV.

Simple wrapper to process csv's with a pipeline of testable processors.

CSV++

csvql

CSV Query allows you to run SQL queries against data stored in CSV files.

csv-query

Parses CSV files to a custom SQLite Database, with custom headers and filtering

The csv_rails gem provides a download csv file with rails.

csv_rb provides an csv renderer so you can move all your spreadsheet code from your controller into view files. Now you can keep your controllers thin!

Process csv with SQL.

Add the executable "csv_to_sqlite" to your terminal, wich is used to create a SQLite3 database with all data from a csv file by running "csv_to_sqlite file.csv". It was developed to be used as a command line.

Sync Contacts with the server and returns matched contacts.