Website footprinting

General website footprinting
burp suite
zaproxy
website informer
firebug

WHOIS
https://whois.domaintools.com
https://lookup.icann.org
https://www.name.com/whois-lookup
https://who.is/
https://www.whois.net/
http://lantricks.com
http://www.networkmost.com
http://tialsoft.com
http://www.johnru.com

DNS info
https://mxtoolbox.com
http://www.dnsstuff.com
http://network-tools.com
http://ww.kloth.net

Find subdomains/alternate domains
bgp.he.net
whois.arin.net
shodan.io

Website History
https://archive.org/web/

Download Websites
www.httrack.com/page/2/
http://www.surfoffline.com/
http://softbytelabs.com
http://www.tensons.com

Website statistics
http://www.monitis.com/
https://www.web-stat.com/
https://www.contentpowered.com/blog/alexa-com-dead-alternatives/
Reputation: www.trackur.com