Generic Web crawler with a DSL that parses event-related data from web pages

Web crawler to get courses from XML pages at mymav.uta

Jobs crawler

A simple web crawler gem

Web crawler with JSON-based DSL and EventMachine-powered page fetching

Simple site crawler using Capybara

A demo of Web Crawler using arb-crawler

Web page crawler.

A periodic crawler that fetches the latest CVE additions, parses them, and filters them

Easy way to enable AdSense crawler to login and see private or custom pages in your rails application. Basically one custom login filter. Gem enables you to easily slightly increase revenues from Google AdSense/AdWords. It makes it easy to enable crawling on private pages and so get better target...

The Baidu Crawler is to crawl data with your demmand

A generic web crawler that doesn't crawl outside URLs.

Asynchronous web crawler, scraper and file harvester

Crawl instagram photos, posts and videos for download.

An easy to use distributed web-crawler framework based on Redis

Arachnid is a web crawler that relies on Bloom Filters to efficiently store visited urls and Typhoeus to avoid the overhead of Mechanize when crawling every page on a domain.

validate-website is a web crawler for checking the markup validity with XML Schema / DTD and not found urls.

Rack Middleware adhering to the Google Ajax Crawling Scheme, using a headless browser to render JS heavy pages and serve a dom snapshot of the rendered state to a requesting search engine.

Post URLs to Wayback Machine (Internet Archive), using a crawler, from Sitemap(s) or a list of URLs.

Ruby web crawler using PhantomJS