- Exploiting Caller ID
- The Software Orange Box is a free proof-of-concept tool which can spoof most forms of North American Caller ID.
- Fyodor's Exploit World
- A large and descriptive exploit archive organized by affected operating systems.
- Metasploit Project
- The Metasploit Project is an open source computer security project which provides information about security vulnerabilities and aids in penetration testing and IDS signature development. Its most well-known sub-project is the Metasploit Framework, a tool for developing and executing exploit code against a remote target machine. Other important sub-projects include the Opcode Database, shellcode archive, and security research.