
zeek
Zeek is a powerful network analysis framework that is much different from the typical IDS you may know.
anomaly-detectionanti-botdefensive-tools+14

Zeek is a powerful network analysis framework that is much different from the typical IDS you may know.

Spam filtering and email processing framework with regex rules, statistical analysis, custom Lua plugins, and external blocklists for MTA integration.

Open-source email filtering framework that detects spam and phishing using content analysis, header checks, Bayesian scoring, and DNS blocklists.

amavis is a high-performance email content filter framework written in Perl.

SQL powered operating system instrumentation, monitoring, and analytics.