Linux kernel source tree

A command line tool and library for transferring data with URL syntax, supporting DICT, FILE, FTP, FTPS, GOPHER, GOPHERS, HTTP, HTTPS, IMAP, IMAPS, LDAP, LDAPS, MQTT, MQTTS, POP3, POP3S, RTMP, RTMP…

UNIX-like reverse engineering framework and command-line toolset

How to Make a Computer Operating System in C++

A little tool to play with Windows security

Small and highly portable detection tests based on MITRE's ATT&CK.

The pattern matching swiss knife

Arkime is an open source, large scale, full packet capturing, indexing, and database system.

An implementation of the TLS/SSL protocols

the LIBpcap interface to various kernel packet capture mechanism

MultiMarkdown version of Notational Velocity with Markdown editing features and preview

A network sniffer that logs all DNS server replies for use in a passive DNS setup

Post Exploitation Collection

ultrafast single TCP packet audio/visual experience

TrevorC2 is a legitimate website (browsable) that tunnels client/server communications for covert command execution.

OverTheWire website

The Python interface for YARA

Awesome CSIRT is an curated list of links and resources in security and CSIRT daily activities.

Transparent SSL/TLS proxy for decrypting and diverting network traffic to other programs, such as UTM services, for deep SSL inspection

Large-scale Monitoring and Trend Analysis System

Pivoter is a proxy tool for pentesters to have easier lateral movement.

Official implementation of the VirusTotal API in C programming language

A Two-Way Active Measurement Protocol

Openflow agent on a P4 dataplane

Twamp protocol dissector for Wireshark