NuFW, Now user Filtering Works, is an "authenticating gateway".
It fully integrates with Netfilter and Iptables and adds authentication capabilities. Its exclusive algorithm allows network wide identity-based filtering.
Nulog is a firewall log analysis interface written in php. Netfilter and NuFW are able to log selected packets directly in a database like MySQL or PostgreSQL. Nulog uses this interface to display security events in real-time on a user-friendly interface.
ulogd2 is a userspace logging daemon for netfilter/iptables related logging. This includes per-packet logging of security violations, per-packet logging for accounting purpose as well as per-flow logging.
Suriwire is a plugin for wireshark which displays suricata alerts on a pcap file inside the wireshark output.
Suriwire displays all alerts in the expert info window and displays alerts on a packet in the packet details. Alert fields can be used to filter output.
nf3d is a Netfilter log visualisation tool. Connections and logged packets are displayed in 3D, in a GANTT diagram fashion. The goal of nf3d is to visualise Netfilter related events to be able to detect abnormal behaviour.