MXtoolbox - Domain check and email header analysis

Outwitub - Website analyser. Easy interface

Paterva - Web analyser

Urlm - Show you what the site is about, how popular abd where the host server is.

netglub - Maltego clone

Httrack - Website copier which allows you to download a World Wide Web site from the Internet to a local directory to view off line

Microsystools - Website copier which allows you to download a World Wide Web site from the Internet to a local directory to view off line.

DNS research tools

What is DNS?

Mydnstools

Atlas.ripe - DNS server maps for Europe

DNS Stuff - DNS tools

Dns.robtex - Serach tool for DNS

Whois icann.org - Lookup any generic domains

Domaintools.com - Domain, DNS and Internet OSINT basted intelligence

Bfk.de - Passive DNS replication

Spamcop - Used to report spam emails

Shadowserver - Gathers inteligance on the darker side of the internet.

Sameip - who is also on the same IP

Zone-h - A listof hacking sites and reports of website takeovers

Spamhaus - domain block list and ROKSO

Surbl -  checks the integrity of a URL