holehe allows you to check if the mail is used on different sites like twitter, instagram and will retrieve information on sites with the forgotten password function.

homepwn

HomePwn - Swiss Army Knife for Pentesting of IoT Devices

honeycreds

HoneyCreds network credential injection to detect responder and other network poisoners.

horn3t

Powerful Visual Subdomain Enumeration at the Click of a Mouse

hostapd-mana

SensePost's modified hostapd for wifi attacks.

hosthunter

HostHunter a recon tool for discovering hostnames using OSINT techniques.

This function runs a number of checks on a system to help provide situational awareness to a penetration tester during the reconnaissance phase. It gathers information about the local system, users, and domain information. It does not use any 'net', 'ipconfig', 'whoami', 'netstat', or other system commands to help avoid detection.

hotap-jammer

Jammer 2.4G and 5G AP wifi

how2heap

A repository for learning various heap exploitation techniques.

howtohunt

Tutorials and Things to Do while Hunting Vulnerability.

howtowinccdc

Notes, Slides, Comments and Commands on How to Win CCDC

htpwdscan

A python HTTP weak pass scanner

htran

HTran is a connection bouncer, a kind of proxy server. A “listener” program is hacked stealthily onto an unsuspecting host anywhere on the Internet. When it receives signals from the actual target system, it redirects it to the hacker’s server.