httest is a script based tool for testing and benchmarking web applications, web servers, proxy servers and web browsers. httest can emulate clients and servers in the same test script, very useful for testing proxys.
MIDAS is a Network Monitoring and intrusion detection server. It uses a distributed client/server model that allows it to scale to very large networks. As well its own client It supports both Netsaint plugins and Big Brother Clients.
QuIDScor is a daemon software integrating Intrusion Detection Systems (IDS) and vulnerability assesment and management platforms.
Today QuIDScor correlates and verifies Snort alerts against QualysGuard vulnerability assessment data.