social-engineering

Maltego is an open source intelligence and forensics application. It will offer you timous mining and gathering of information as well as the representation of this information in a easy to understand format.

Lampyre - an efficient data analysis and OSINT multi-tool for everyone. Obtain, visualize and analyze data in one place to see what others can't.

The Social-Engineer Toolkit is an open source penetration testing framework designed for social engineering. SET has a number of custom attack vectors that allow you to make a believable attack quickly.