social-engineering

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.

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.

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.