BEST WEB CRAWLING SITES
https://www.cyotek.com/cyotek-webcopy
http://www.octoparse.com/
https://www.httrack.com/
https://chrome.google.com/webstore/detail/scraper/mbigbapnjcgaffohmbkdlecaccepngjd
https://addons.mozilla.org/en-US/firefox/addon/outwit-hub/
http://visualscraper.blogspot.hk/
https://www.parsehub.com/
https://scrapinghub.com/
https://webhose.io/
https://dexi.io/
https://www.import.io/
https://www.spinn3r.com/