#1Tools for consuming, aggregating, and analyzing external threat intelligence feeds from various sources.
Kitploit recommended

A Python library for handling TAXII Messages invoking TAXII Services.
A datasource assessment on an event level to show potential coverage or the MITRE ATT&CK framework

Look for un-sinkholed C&C IPs in your Bro logs (from Bambanek Consulting C&C master list)

A tool to assist with network-based hunting for GRU's Drovorub malware c2

Don't Just Search OSINT. Sweep It.

A Linux Auditd rule set mapped to MITRE's Attack Framework

Automater - IP URL and MD5 OSINT Analysis