[Surveillance Watch: They Know Who You Are]
"Surveillance Watch is an interactive map revealing the intricate connections between surveillance companies, their funding sources and affiliations."
This is a volunteer-driven, well-cited database of global surveillance companies and how they interrelate. It's very well-executed: a pleasure to use, and the visualizations show clearly how data is extracted to companies across the globe, skirting local privacy regulations in the process.
[Link]