web scraping tools

Web scraping tools, services, and plugins: a comprehensive list 
 Ruby project called Upton – haven’t tried it yet but it’s from the Tumblr blog Onethingwell whose picks tend to be OK. 
 10 Web Scraping Tools to Extract Online Data – added April 2016. Includes use case examples. 
 To Scrape or Not to Scrape: Technical and Ethical Challenges of Collecting Data off the Web – April 4, 2016