Vessel: Ruby web crawling framework by Evrone

Vessel is a fast, open source, high-level, web crawling and scraping framework for Ruby, built on top of Ferrum — a minimal-dependency pure-Ruby driver for running headless Google Chrome instances.Why would you need a web crawler? Perhaps you're building a search engine for an intranet or a group of public-facing websites, or just need to mirror a website with finer-grained control than tools such as wget offer.