DataWalk - DataWalk is a software platform to connect numerous large data sets, both external and internal, into a single repository for fast visual analysis.
Lampyre - Lampyre - an efficient data analysis and OSINT multi-tool for everyone.
sn0int - sn0int is a semi-automatic OSINT framework and package manager
Maltego - Maltego is an open source intelligence and forensics application.
Netglub - Netglub, the really open source information gathering solution.
dradis - Dradis is the open-source reporting and collaboration tool for IT security professionals.