GitHub - s0md3v/Smap: a drop-in replacement for Nmap powered by shodan.io

💀 Sploitus | Exploits & Tools Search Engine

Offensive Security’s Exploit Database Archive

GTFOBins

https://skidsearch.net

Spyse — Internet Assets Search Engine

Tools - Intelligence X

LeakIX

Home - Censys

https://www.shodan.io/dashboard

ZoomEye - Cyberspace Search Engine

Information by IP Address

Whois Lookup, Domain Availability & IP Search - DomainTools

https://securitytrails.com/dns-trails#/

http://viewdns.info

DNSdumpster.com - dns recon and research, find and lookup dns records

Subdomain Finder - C99.nl

GitHub - cybertoolbank/hidend: Tool for finding website backends.

fierce | Kali Linux Tools

IBM X-Force Exchange

https://hypestat.com

MX Lookup Tool - Check your DNS MX Records online - MxToolbox

Internet Archive: Wayback Machine

Arquivo.pt - pesquise páginas do passado!

Know. Before it matters

Public Buckets

Public Buckets by GrayhatWarfare

Receive SMS Online | Temporary and Disposable Phone Numbers

SMAIL PRO | Temp mail - Temp Gmail - Disposable Fake Email

Emkei's Fake Mailer

DNSBL Information - Spam Database Lookup

BarracudaCentral.org - Technical Insight for Security Pros

http://www.kloth.net/services/dnsbl.php

Cisco Talos Intelligence Group - Comprehensive Threat Intelligence