Cacher is the code snippet organizer for pro developers

http://latency.hosteurope.de/
https://www.telstra.net/cgi-bin/trace
http://tools.telpin.com.ar/cgi-bin/traceroute

http://www.digwebinterface.com/
http://dig-nslookup.nmonitoring.com/dns-dig-nslookup.html
http://www.kloth.net/services/dig.php
https://toolbox.googleapps.com/apps/dig/#A/

http://www.cgis.biz/tools/traceroute/
http://www.cgis.biz/tools/nslookup/
http://www.cgis.biz/tools/whois/

http://www.geektools.com/traceroute.php
http://www.geektools.com/digtool.php

HTTP HEADERS

http://api.hackertarget.com/httpheaders/?q=[URI]
http://headers.cloxy.net/
http://web-sniffer.net/
http://tools.seochat.com/tools/link-header-checker/
https://urivalet.com/
http://www.internetmarketingninjas.com/header-checker/
https://httpstatus.io/


curl: 
time curl -IkNRS [URI]

ONLINE SCANNERS

http://www.virustotal.com/
https://www.fortiguard.com/antivirus/virus_scanner.html
https://www.hybrid-analysis.com/
https://malwr.com/submission/
https://www.metascan-online.com/
https://www.phishtank.com/
http://urlquery.net/
https://virusscan.jotti.org/
https://vms.drweb.com/online/?lng=en
http://csi.websense.com/
https://wepawet.iseclab.org/
https://en.wikipedia.org/wiki/MX_record
http://www.abuseipdb.com/
http://ipvoid.com/
https://mxtoolbox.com/Public/Tools/EmailHeaders.aspx
https://quttera.com/website-malware-scanner
http://www.rexswain.com/httpview.html
https://www.robtex.com/
https://sitecheck.sucuri.net/
https://virustracker.net/
https://isc.sans.edu/tools/
https://anubis.iseclab.org/
http://threatstop.com/checkip

DOWNLOAD

http://www.kaspersky.com/free-tools

collection of online tools

HUGE TOOLBOXES 

http://www.whatsmyip.org/
http://www.webconfs.com/