Sergey Polzunov

RuleCheck.io — Automatic QA for threat detection rules.

BlackStork.io — Automating cybersecurity reporting.

Stixview — JS library for embeddable STIX2 graphs.

Graphs of the routed autonomous systems: IPv4 (as seen on Sep 25, 2014) and IPv6 (as seen on Oct 1, 2014)