Kimurai is a modern web scraping framework written in Ruby which works out of box with Headless Chromium/Firefox, PhantomJS, or simple HTTP requests and allows to scrape and interact with JavaScript rendered websites
Ruby gem that fetches images and metadata from a given URL. Much like popular social website with link preview.
Mechanize is a ruby library that makes automated web interaction easy.
A versatile Ruby web spidering library that can spider a site, multiple domains, certain links or infinitely. Spidr is designed to be fast and easy to use.
A batteries-included framework for easy web-scraping. Just add CSS! (Or do more.)
Lightweight Ruby web crawler/scraper with an elegant DSL which extracts structured data from pages.