attack_of_the_clones.sh

#!/bin/bash

repos=(
    'https://github.com/github/gitignore'
    'https://github.com/twitter/bootstrap'
    'https://github.com/h5bp/html5-boilerplate'
    'https://github.com/cloudhead/less.js'

    'https://github.com/jquery/jquery'
    'https://github.com/jquery/jquery-mobile'
    'https://github.com/jquery/jquery-ui'
    'https://github.com/blueimp/jQuery-File-Upload'
    'https://github.com/harvesthq/chosen'

    'https://github.com/angular/angular.js'
    'https://github.com/mitsuhiko/flask'
    'https://github.com/mitsuhiko/jinja2'
)

printf "%s\n" "${repos[@]}" | parallel -j4 git clone {}

Documentation to Download

## Ruby Documentation

http://ruby-doc.org/downloads/