Open Source Intelligence

Documentation
History Master
SingleFile

Company Information
https://www.google.com/maps/
https://earth.google.com
https://showmystreet.com/
https://www.xing.com
https://www.monster.com/
https://indeed.com
https://www.glassdoor.de
https://www.trustpilot.com/

Domain Information
https://crt.sh/
CTFR.py
https://certificate.transparency.dev/
ARIN Search
https://mxtoolbox.com/
ICANN Lookup
https://dnsdumpster.com/
GCP IP ranges
Azure IP ranges
DigitalOcean IP Ranges
AWS IP Ranges
IP2Provider.py
https://buckets.grayhatwarfare.com/
https://builtwith.com/
https://www.shodan.io/
https://archive.org/
https://archive.fo/

Files
https://www.virustotal.com/gui/
http://archive.fo/
https://pastebin.com/
Exiftool

Social Networks
https://twitter.com/
https://www.linkedin.com/
https://www.instagram.com/
https://www.snapchat.com/
https://www.youtube.com/
https://www.wechat.com/
https://www.facebook.com/

Search Engines
https://www.google.com/
https://www.bing.com/
https://yahoo.com
https://www.baidu.com/
https://yandex.ru/
https://duckduckgo.com/
https://ask.com
https://www.ecosia.org/
https://www.aol.de
https://archive.org/
https://allpeople.com/
https://hunter.io/
https://emailrep.io/
https://rocketreach.co/
https://www.crunchbase.com/
https://finance.yahoo.com/
https://tineye.com/
https://images.google.com/
https://app.neilpatel.com/en/seo_analyzer/backlinks
https://www.virustotal.com/gui/
theHarvester.py
h8mail.py
https://securitytrails.com/

Development Platforms
https://github.com/
https://about.gitlab.com/
https://code.google.com/
https://bitbucket.org/
https://searchcode.com/
https://pastebin.com/

Forums
https://www.reddit.com/
https://stackoverflow.com/
https://quora.com/
https://www.sitepoint.com/
https://www.codeproject.com/
https://teamtreehouse.com/
https://stackexchange.com/

Leak Resources
Rapid7 FDNS Databases
https://haveibeenpwned.com/
http://archive.fo/
https://archive.org/
https://www.cvedetails.com/
https://www.exploit-db.com/
https://vuldb.com/
https://cve.mitre.org/
https://www.securityfocus.com/