What's OSINT? : Best Free OSINT Information Gathering Tools

OSINT Stands For Open Source Intelligence Which  is the amassment and review of open or plenarily accessible material. Throughout the roles of national security, law enforcement, cyber security professionals, gregarious engineers and business perspicacity, OSINT is mainly utilized. 

"One who knows the enemy and knows himself will not be endangered in a hundred engagements" - Sun Tzu

OSINT has  been around possibly for [1] hundreds of years (e.g  Foreign Broadcast Information Service). 

However, Since Now it is possible to access a great deal of actionable and predictive information from public, unclassified sources OSINT Has Become Easier For Cyber Security Professionals.

Social media, forums, groups, websites, web journals and search engines, blogs, technical reports etc. are the key sources of the OSINT process.

So without further ado Here's A List Of The Best Free Universal Information Gathering OSINT Tool's :

Username Related :

• UserSearch.org
• Check Usernames
• Namechk

Dating Related :

• Match.com
• Truedater

Metadata Related :

• Metagoofil
• ExifTool

Social Media Related :

1. Hashtagify
2. Facebook Search Tool
3. Backtweets

Domain Name Related :

• Whois Records :

1. Website Informer
2. DomainTools Whois
3. Robtex 
4. DNStable

• Social Analysing :

1. Google Trends

• Certificate Search :

1. Censys
2. Google's Certificate Transparency

• Domain Discovery :

1. Shodan
2. SiteDiff (tool) 
3. Kraken (tool) 

Messaging Related :

• Skypegrab
• YikMap

Email Address Related :

• Data Breach :

1. Breach or Clear
2. Have I been pwned?
3. DeHashed
4. LeakCheck

• Email Verification :

1. Simple Email Reputation
2. MailTester. 
3. Verify-email

• Search Email : 

1. ThatsThem
2. Melissa
3. MailsHunt

IP Address Related :

• Host Discovery :

1. ZoomEye 
2. Scans.io

•  Geo - location :

1. My IP Address
2. Info Sniper
3. InfobyIP.com